User equipments, base stations and methods

ABSTRACT

A user equipment (UE) is described. The UE includes a higher layer processor configured to acquire a first radio resource control (RRC) configuration including first information for indicating a control resource set (CORESET) duration, and to acquire second RRC configuration including second information for indicating physical downlink control channel (PDCCH) monitoring symbols. The UE also includes receiving circuitry configured to monitor a PDCCH, based on the first information and the second information. The CORESET duration is set to a value larger than 1. The second information is bitmap information. Each bit of the bitmap information corresponds to a respective OFDM symbol in a slot. The bit of which value is set to 1 indicates a start of a PDCCH monitoring occasion. The bitmap information is set such that any two adjacent PDCCH monitoring occasions do not overlap with each other.

RELATED APPLICATIONS

This application is related to and claims priority from U.S. ProvisionalPatent Application No. 62/586,378, entitled “USER EQUIPMENTS, BASESTATIONS AND METHODS,” filed on Nov. 15, 2017, which is herebyincorporated by reference herein, in its entirety.

TECHNICAL FIELD

The present disclosure relates generally to communication systems. Morespecifically, the present disclosure relates to new signaling,procedures, user equipment (UE) and base stations for user equipments,base stations and methods.

BACKGROUND

Wireless communication devices have become smaller and more powerful inorder to meet consumer needs and to improve portability and convenience.Consumers have become dependent upon wireless communication devices andhave come to expect reliable service, expanded areas of coverage andincreased functionality. A wireless communication system may providecommunication for a number of wireless communication devices, each ofwhich may be serviced by a base station. A base station may be a devicethat communicates with wireless communication devices.

As wireless communication devices have advanced, improvements incommunication capacity, speed, flexibility and/or efficiency have beensought. However, improving communication capacity, speed, flexibilityand/or efficiency may present certain problems.

For example, wireless communication devices may communicate with one ormore devices using a communication structure. However, the communicationstructure used may only offer limited flexibility and/or efficiency. Asillustrated by this discussion, systems and methods that improvecommunication flexibility and/or efficiency may be beneficial.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating one implementation of one or moregNBs and one or more user equipments (UEs) in which systems and methodsfor uplink transmission may be implemented;

FIG. 2 illustrates various components that may be utilized in a UE;

FIG. 3 illustrates various components that may be utilized in a gNB;

FIG. 4 is a block diagram illustrating one implementation of a UE inwhich systems and methods for performing uplink transmissions may beimplemented;

FIG. 5 is a block diagram illustrating one implementation of a gNB inwhich systems and methods for performing uplink transmissions may beimplemented;

FIG. 6 is a diagram illustrating one example of a resource;

FIG. 7 shows examples of several numerologies;

FIG. 8 shows examples of subframe structures for the numerologies thatare shown in FIG. 7;

FIG. 9 shows examples of subframe structures for the numerologies thatare shown in FIG. 7;

FIG. 10 shows examples of slots and sub-slots;

FIG. 11 shows examples of scheduling timelines;

FIG. 12 is a block diagram illustrating one implementation of a gNB;

FIG. 13 is a block diagram illustrating one implementation of a UE;

FIG. 14 illustrates an example of control resource unit and referencesignal structure;

FIG. 15 illustrates an example of control channel and shared channelmultiplexing;

FIG. 16 illustrates PDCCH monitoring occasions for slot-basedscheduling;

FIG. 17 illustrates PDCCH monitoring occasions for non-slot-basedscheduling;

FIG. 18 illustrates an example of slot formats for a given slot;

FIG. 19 illustrates an example of downlink scheduling and a HybridAutomatic Repeat reQuest (HARQ) timeline;

FIG. 20 illustrates an example of uplink scheduling timeline;

FIG. 21 illustrates an example of downlink aperiodic Channel Stateinformation-reference signal (CSI-RS) transmission timeline;

FIG. 22 illustrates an example of uplink aperiodic Sounding ReferenceSignals (SRS) transmission timeline;

FIG. 23 illustrates a flow chart of a method for a UE;

FIG. 24 illustrates a flow chart of a method for a gNB;

FIG. 25 illustrates a flow chart of a method for UE; and

FIG. 26 illustrates a flow chart of a method for a base station.

DETAILED DESCRIPTION

A user equipment (UE) is described. The UE includes a higher layerprocessor configured to acquire a first radio resource control (RRC)configuration including first information for indicating a controlresource set (CORESET) duration, and to acquire second RRC configurationincluding second information for indicating physical downlink controlchannel (PDCCH) monitoring symbols. The UE also includes receivingcircuitry configured to monitor a PDCCH, based on the first informationand the second information. The CORESET duration may be set to a valuelarger than 1. The second information may be bitmap information. Eachbit of the bitmap information may correspond to a respective OFDM symbolin a slot. The bit of which value is set to 1 may indicate a start of aPDCCH monitoring occasion. The bitmap information may be set such thatany two adjacent PDCCH monitoring occasions do not overlap with eachother.

A base station is described. The base station includes a higher layerprocessor configured to send a first radio resource control (RRC)configuration including first information for indicating a controlresource set (CORESET) duration, and to send second RRC configurationincluding second information for indicating physical downlink controlchannel (PDCCH) monitoring symbols. The base station also includestransmitting circuitry configured to transmit a PDCCH, based on thefirst information and the second information. The CORESET duration maybe set to a value larger than 1. The second information may be bitmapinformation. Each bit of the bitmap information may correspond to arespective OFDM symbol in a slot. The bit of which value is set to 1 mayindicate a start of a PDCCH monitoring occasion. The bitmap informationmay be set such that any two adjacent PDCCH monitoring occasions do notoverlap with each other.

A method for a user equipment (UE) is described. The method for a UEcomprises acquiring a first radio resource control (RRC) configurationincluding first information for indicating a control resource set(CORESET) duration. The method for a UE also comprises acquiring secondRRC configuration including second information for indicating physicaldownlink control channel (PDCCH) monitoring symbols. The method for a UEalso comprises monitoring a PDCCH, based on the first information andthe second information. The CORESET duration may be set to a valuelarger than 1. The second information may be bitmap information. Eachbit of the bitmap information may correspond to a respective OFDM symbolin a slot. The bit of which value is set to 1 may indicate a start of aPDCCH monitoring occasion. The bitmap information may be set such thatany two adjacent PDCCH monitoring occasions do not overlap with eachother.

A method for a base station is described. The method for a base stationcomprises sending a first radio resource control (RRC) configurationincluding first information for indicating a control resource set(CORESET) duration. The method for a base station also comprises sendinga second RRC configuration including second information for indicatingphysical downlink control channel (PDCCH) monitoring symbols. The methodfor a base station also comprises transmitting a PDCCH, based on thefirst information and the second information. The CORESET duration maybe set to a value larger than 1. The second information may be bitmapinformation. Each bit of the bitmap information may correspond to arespective OFDM symbol in a slot. The bit of which value is set to 1 mayindicate a start of a PDCCH monitoring occasion. The bitmap informationmay be set such that any two adjacent PDCCH monitoring occasions do notoverlap with each other.

The 3rd Generation Partnership Project, also referred to as “3GPP,” is acollaboration agreement that aims to define globally applicabletechnical specifications and technical reports for third and fourthgeneration wireless communication systems. The 3GPP may definespecifications for next generation mobile networks, systems and devices.

3GPP Long Term Evolution (LTE) is the name given to a project to improvethe Universal Mobile Telecommunications System (UMTS) mobile phone ordevice standard to cope with future requirements. In one aspect, UMTShas been modified to provide support and specification for the EvolvedUniversal Terrestrial Radio Access (E-UTRA) and Evolved UniversalTerrestrial Radio Access Network (E-UTRAN).

At least some aspects of the systems and methods disclosed herein may bedescribed in relation to the 3GPP LTE, LTE-Advanced (LTE-A) and otherstandards (e.g., 3GPP Releases 8, 9, 10, 11, 12, 13, 14 and/or 15)including New Radio (NR) which is also known as 5G. However, the scopeof the present disclosure should not be limited in this regard. At leastsome aspects of the systems and methods disclosed herein may be utilizedin other types of wireless communication systems.

A wireless communication device may be an electronic device used tocommunicate voice and/or data to a base station, which in turn maycommunicate with a network of devices (e.g., public switched telephonenetwork (PSTN), the Internet, etc.). In describing systems and methodsherein, a wireless communication device may alternatively be referred toas a mobile station, a UE, an access terminal, a subscriber station, amobile terminal, a remote station, a user terminal, a terminal, asubscriber unit, a mobile device, etc. Examples of wirelesscommunication devices include cellular phones, smart phones, personaldigital assistants (PDAs), laptop computers, netbooks, e-readers,wireless modems, vehicles, Internet of Things (IoT) devices, etc. In3GPP specifications, a wireless communication device is typicallyreferred to as a UE. However, as the scope of the present disclosureshould not be limited to the 3GPP standards, the terms “UE” and“wireless communication device” may be used interchangeably herein tomean the more general term “wireless communication device.” A UE mayalso be more generally referred to as a terminal device.

In 3GPP specifications, a base station is typically referred to as aNode B, an evolved Node B (eNB), a home enhanced or evolved Node B(HeNB), a next Generation Node B (gNB) or some other similarterminology. As the scope of the disclosure should not be limited to3GPP standards, the terms “base station,” “Node B,” “eNB,” “HeNB,” and“gNB” may be used interchangeably herein to mean the more general term“base station.” Furthermore, the term “base station” may be used todenote an access point. An access point may be an electronic device thatprovides access to a network (e.g., Local Area Network (LAN), theInternet, etc.) for wireless communication devices. The term“communication device” may be used to denote both a wirelesscommunication device and/or a base station. An eNB and gNB may also bemore generally referred to as a base station device.

It should be noted that as used herein, a “cell” may be anycommunication channel that is specified by standardization or regulatorybodies to be used for International Mobile Telecommunications-Advanced(IMT-Advanced) and all of it or a subset of it may be adopted by 3GPP aslicensed bands (e.g., frequency bands) to be used for communicationbetween an eNB and a UE. It should also be noted that in E-UTRA andE-UTRAN overall description, as used herein, a “cell” may be defined as“combination of downlink and optionally uplink resources.” The linkingbetween the carrier frequency of the downlink resources and the carrierfrequency of the uplink resources may be indicated in the systeminformation transmitted on the downlink resources.

“Configured cells” are those cells of which the UE is aware and isallowed by an eNB to transmit or receive information. “Configuredcell(s)” may be serving cell(s). The UE may receive system informationand perform the required measurements on all configured cells.“Configured cell(s)” for a radio connection may include a primary celland/or no, one, or more secondary cell(s). “Activated cells” are thoseconfigured cells on which the UE is transmitting and receiving. That is,activated cells are those cells for which the UE monitors the physicaldownlink control channel (PDCCH) and in the case of a downlinktransmission, those cells for which the UE decodes a physical downlinkshared channel (PDSCH). “Deactivated cells” are those configured cellsthat the UE is not monitoring the transmission PDCCH. It should be notedthat a “cell” may be described in terms of differing dimensions. Forexample, a “cell” may have temporal, spatial (e.g., geographical) andfrequency characteristics.

The 5th generation communication systems, dubbed NR (New Radiotechnologies) by 3GPP, envision the use of time/frequency/spaceresources to allow for services, such as eMBB (enhanced MobileBroad-Band) transmission, URLLC (Ultra-Reliable and Low LatencyCommunication) transmission, and eMTC (massive Machine TypeCommunication) transmission. Also, in NR, single-beam and/or multi-beamoperations is considered for downlink and/or uplink transmissions.

Various examples of the systems and methods disclosed herein are nowdescribed with reference to the Figures, where like reference numbersmay indicate functionally similar elements. The systems and methods asgenerally described and illustrated in the Figures herein could bearranged and designed in a wide variety of different implementations.Thus, the following more detailed description of severalimplementations, as represented in the Figures, is not intended to limitscope, as claimed, but is merely representative of the systems andmethods.

FIG. 1 is a block diagram illustrating one implementation of one or moregNBs 160 and one or more UEs 102 in which systems and methods fordownlink and uplink transmissions may be implemented. The one or moreUEs 102 communicate with one or more gNBs 160 using one or more physicalantennas 122 a-n. For example, a UE 102 transmits electromagneticsignals to the gNB 160 and receives electromagnetic signals from the gNB160 using the one or more physical antennas 122 a-n. The gNB 160communicates with the UE 102 using one or more physical antennas 180a-n.

The UE 102 and the gNB 160 may use one or more channels and/or one ormore signals 119, 121 to communicate with each other. For example, theUE 102 may transmit information or data to the gNB 160 using one or moreuplink channels 121. Examples of uplink channels 121 include a physicalshared channel (e.g., PUSCH (Physical Uplink Shared Channel)), and/or aphysical control channel (e.g., PUCCH (Physical Uplink ControlChannel)), etc. The one or more gNBs 160 may also transmit informationor data to the one or more UEs 102 using one or more downlink channels119, for instance. Examples of downlink channels 119 physical sharedchannel (e.g., PDSCH (Physical Downlink Shared Channel), and/or aphysical control channel (PDCCH (Physical Downlink Control Channel)),etc. Other kinds of channels and/or signals may be used.

Each of the one or more UEs 102 may include one or more transceivers118, one or more demodulators 114, one or more decoders 108, one or moreencoders 150, one or more modulators 154, a data buffer 104 and a UEoperations module 124. For example, one or more reception and/ortransmission paths may be implemented in the UE 102. For convenience,only a single transceiver 118, decoder 108, demodulator 114, encoder 150and modulator 154 are illustrated in the UE 102, though multipleparallel elements (e.g., transceivers 118, decoders 108, demodulators114, encoders 150 and modulators 154) may be implemented.

The transceiver 118 may include one or more receivers 120 and one ormore transmitters 158. The one or more receivers 120 may receive signalsfrom the gNB 160 using one or more antennas 122 a-n. For example, thereceiver 120 may receive and downconvert signals to produce one or morereceived signals 116. The one or more received signals 116 may beprovided to a demodulator 114. The one or more transmitters 158 maytransmit signals to the gNB 160 using one or more physical antennas 122a-n. For example, the one or more transmitters 158 may upconvert andtransmit one or more modulated signals 156.

The demodulator 114 may demodulate the one or more received signals 116to produce one or more demodulated signals 112. The one or moredemodulated signals 112 may be provided to the decoder 108. The UE 102may use the decoder 108 to decode signals. The decoder 108 may producedecoded signals 110, which may include a UE-decoded signal 106 (alsoreferred to as a first UE-decoded signal 106). For example, the firstUE-decoded signal 106 may comprise received payload data, which may bestored in a data buffer 104. Another signal included in the decodedsignals 110 (also referred to as a second UE-decoded signal 110) maycomprise overhead data and/or control data. For example, the secondUE-decoded signal 110 may provide data that may be used by the UEoperations module 124 to perform one or more operations.

In general, the UE operations module 124 may enable the UE 102 tocommunicate with the one or more gNBs 160. The UE operations module 124may include one or more of a UE scheduling module 126.

The UE scheduling module 126 may perform uplink transmissions. Theuplink transmissions include data transmission transmission) and/oruplink reference signal transmission.

In a radio communication system, physical channels (uplink physicalchannels and/or downlink physical channels) may be defined. The physicalchannels (uplink physical channels and/or downlink physical channels)may be used for transmitting information that is delivered from a higherlayer. For example, PCCH (Physical Control Channel) may be defined. PCCHis used to transmit control information.

In uplink, PCCH (e.g., Physical Uplink Control Channel (PUCCH)) is usedfor transmitting Uplink Control Information (UCI). The UCI may includeHybrid Automatic Repeat Request (HARQ-ACK), Channel State information(CSI), and/or Scheduling Request (SR). The HARQ-ACK is used forindicating a positive acknowledgement (ACK) or a negative acknowledgment(NACK) for downlink data (i.e., Transport block(s), Medium AccessControl Protocol Data Unit (MAC PDU), and/or Downlink Shared Channel(DL-SCH)). The CSI is used for indicating state of downlink channel.Also, the SR is used for requesting resources of uplink data (i.e.,Transport block(s), MAC PDU, and/or Uplink Shared Channel (UL-SCH)).

In downlink, PCCH (e.g., Physical Downlink Control Channel (PDCCH)) maybe used for transmitting Downlink Control Information (DCI). Here, morethan one DCI formats may be defined for DCI transmission on the PDCCH.Namely, fields may be defined in the DCI format, and the fields aremapped to the information bits (i.e., DCI bits). For example, a DCIformat 1A that is used for scheduling of one physical shared channel(PSCH) (e.g., PDSCH, transmission of one downlink transport block) in acell is defined as the DCI format for the downlink. The DCI format(s)for PDSCH scheduling may include multiple information field, forexample, carrier indicator field, frequency domain PDSCH resourceallocation field, time domain PDSCH resource allocation field, bundlingsize field, MCS field, new data indicator field, redundancy versionfield, HARQ process number field, code block group flush indicator(CBGFI) field, code block group transmission indicator (CBGTI) field,PUCCH power control field, PUCCH resource indicator field, antenna portfield, number of layer field, quasi-co-location (QCL) indication field,SRS triggering request field, and RNTI field. More than one pieces ofthe above information may be jointly coded, and in this instance jointlycoded information may be indicated in a single information field.

Also, for example, a DCI format 0 that is used for scheduling of onePSCH (e.g., PUSCH, transmission of one uplink transport block) in a cellis defined as the DCI format for the uplink. For example, informationassociated with PSCH (a PDSCH resource, PUSCH resource) allocation,information associated with modulation and coding scheme (MCS) for PSCH,and DCI such as Transmission Power Control (TPC) command for PUSCHand/or PUCCH are included the DCI format. Also, the DCI format mayinclude information associated with a beam index and/or an antenna port.The beam index may indicate a beam used for downlink transmissions anduplink transmissions. The antenna port may include DL antenna portand/or UL antenna port. The DCI format(s) for PUSCH scheduling mayinclude multiple information field, for example, carrier indicatorfield, frequency domain PUSCH resource allocation field, time domainPUSCH resource allocation field, MCS field, new data indicator field,redundancy version field, HARQ process number field, code block groupflush indicator (CBGFI) field, code block group transmission indicator(CBGTI) field, PUSCH power control field, SRS resource indicator (SRI)field, wideband and/or subband transmit precoding matrix indicator(TPMI) field, antenna port field, scrambling identity field, number oflayer field, CSI report triggering request field, CSI measurementrequest field, SRS triggering request field, and RNTI field. More thanone pieces of the above information may be jointly coded, and in thisinstance jointly coded information may be indicated in a singleinformation field.

Also, for example, PSCH may be defined. For example, in a case that thedownlink PSCH resource (e.g., PDSCH resource) is scheduled by using theDCI format, the UE 102 may receive the downlink data, on the scheduleddownlink PSCH resource. Also, in a case that the uplink PSCH resource(e.g., PUSCH resource) is scheduled by using the DCI format, the UE 102transmits the uplink data, on the scheduled uplink PSCH resource.Namely, the downlink PSCH is used to transmit the downlink data. And,the uplink PSCH is used to transmit the uplink data.

Furthermore, the downlink PSCH and the uplink PSCH are used to transmitinformation of higher layer (e.g., Radio Resource Control (RRC)) layer,and/or MAC layer). For example, the downlink PSCH and the uplink PSCHare used to transmit RRC message (RRC signal) and/or MAC Control Element(MAC CE). Here, the RRC message that is transmitted from the gNB 160 indownlink may be common to multiple UEs 102 within a cell (referred as acommon RRC message). Also, the RRC message that is transmitted from thegNB 160 may be dedicated to a certain UE 102 (referred as a dedicatedRRC message). The RRC message and/or the MAC CE are also referred to asa higher layer signal.

Furthermore, in the radio communication for uplink, UL RS(s) is used asuplink physical signal(s). The uplink physical signal is not used totransmit information that is provided from the higher layer, but is usedby a physical layer. For example, the UL RS(s) may include thedemodulation reference signal(s), the UE-specific reference signal(s),the sounding reference signal(s), and/or the beam-specific referencesignal(s). The demodulation reference signal(s) may include demodulationreference signal(s) associated with transmission of uplink physicalchannel (e.g., PUSCH and/or PUCCH).

Also, the UE-specific reference signal(s) may include referencesignal(s) associated with transmission of uplink physical channel (e.g.,PUSCH and/or PUCCH). For example, the demodulation reference signal(s)and/or the UE-specific reference signal(s) may be a valid reference fordemodulation of uplink physical channel only if the uplink physicalchannel transmission is associated with the corresponding antenna port.The gNB 160 may use the demodulation reference signal(s) and/or theUE-specific reference signal(s) to perform (re)configuration of theuplink physical channels. The sounding reference signal may be used tomeasure an uplink channel state.

The UE operations module 124 may provide information 148 to the one ormore receivers 120. For example, the UE operations module 124 may informthe receiver(s) 120 when to receive retransmissions.

The UE operations module 124 may provide information 138 to thedemodulator 114. For example, the UE operations module 124 may informthe demodulator 114 of a modulation pattern anticipated fortransmissions from the gNB 160.

The UE operations module 124 may provide information 136 to the decoder108. For example, the UE operations module 124 may inform the decoder108 of an anticipated encoding for transmissions from the gNB 160.

The UE operations module 124 may provide information 142 to the encoder150. The information 142 may include data to be encoded and/orinstructions for encoding. For example, the UE operations module 124 mayinstruct the encoder 150 to encode transmission data 146 and/or otherinformation 142. The other information 142 may include PDSCH HARQ-ACKinformation.

The encoder 150 may encode transmission data 146 and/or otherinformation 142 provided by the UE operations module 124. For example,encoding the transmission data 146 and/or other information 142 mayinvolve error detection and/or correction coding, mapping data to space,time and/or frequency resources for transmission, multiplexing, etc. Theencoder 150 may provide encoded data 152 to the modulator 154.

The UE operations module 124 may provide information 144 to themodulator 154. For example, the UE operations module 124 may inform themodulator 154 of a modulation type (e.g., constellation mapping) to beused for transmissions to the gNB 160. The modulator 154 may modulatethe encoded data 152 to provide one or more modulated signals 156 to theone or more transmitters 158.

The UE operations module 124 may provide information 140 to the one ormore transmitters 158. This information 140 may include instructions forthe one or more transmitters 158. For example, the UE operations module124 may instruct the one or more transmitters 158 when to transmit asignal to the gNB 160. For instance, the one or more transmitters 158may transmit during a UL subframe. The one or more transmitters 158 mayupconvert and transmit the modulated signal(s) 156 to one or more gNBs160.

Each of the one or more gNBs 160 may include one or more transceivers176, one or more demodulators 172, one or more decoders 166, one or moreencoders 109, one or more modulators 113, a data buffer 162 and a gNBoperations module 182. For example, one or more reception and/ortransmission paths may be implemented in a gNB 160. For convenience,only a single transceiver 176, decoder 166, demodulator 172, encoder 109and modulator 113 are illustrated in the gNB 160, though multipleparallel elements (e.g., transceivers 176, decoders 166, demodulators172, encoders 109 and modulators 113) may be implemented.

The transceiver 176 may include one or more receivers 178 and one ormore transmitters 117. The one or more receivers 178 may receive signalsfrom the UE 102 using one or more physical antennas 180 a-n. Forexample, the receiver 178 may receive and downconvert signals to produceone or more received signals 174. The one or more received signals 174may be provided to a demodulator 172. The one or more transmitters 117may transmit signals to the UE 102 using one or more physical antennas180 a-n. For example, the one or more transmitters 117 may upconvert andtransmit one or more modulated signals 115.

The demodulator 172 may demodulate the one or more received signals 174to produce one or more demodulated signals 170. The one or moredemodulated signals 170 may be provided to the decoder 166. The gNB 160may use the decoder 166 to decode signals. The decoder 166 may produceone or more decoded signals 164, 168. For example, a first eNB-decodedsignal 164 may comprise received payload data, which may be stored in adata buffer 162. A second eNB-decoded signal 168 may comprise overheaddata and/or control data. For example, the second eNB-decoded signal 168may provide data (e.g., PDSCH HARQ-ACK information) that may be used bythe gNB operations module 182 to perform one or more operations.

In general, the gNB operations module 182 may enable the gNB 160 tocommunicate with the one or more UEs 102. The gNB operations module 182may include one or more of a gNB scheduling module 194. The gNBscheduling module 194 may perform scheduling of uplink transmissions asdescribed herein.

The gNB operations module 182 may provide information 188 to thedemodulator 172. For example, the gNB operations module 182 may informthe demodulator 172 of a modulation pattern anticipated fortransmissions from the UE(s) 102.

The gNB operations module 182 may provide information 186 to the decoder166. For example, the gNB operations module 182 may inform the decoder166 of an anticipated encoding for transmissions from the UE(s) 102.

The gNB operations module 182 may provide information 101 to the encoder109. The information 101 may include data to be encoded and/orinstructions for encoding. For example, the gNB operations module 182may instruct the encoder 109 to encode information 101, includingtransmission data 105.

The encoder 109 may encode transmission data 105 and/or otherinformation included in the information 101 provided by the gNBoperations module 182. For example, encoding the transmission data 105and/or other information included in the information 101 may involveerror detection and/or correction coding, mapping data to space, timeand/or frequency resources for transmission, multiplexing, etc. Theencoder 109 may provide encoded data 111 to the modulator 113. Thetransmission data 105 may include network data to be relayed to the UE102.

The gNB operations module 182 may provide information 103 to themodulator 113. This information 103 may include instructions for themodulator 113. For example, the gNB operations module 182 may inform themodulator 113 of a modulation type (e.g., constellation mapping) to beused for transmissions to the UE(s) 102. The modulator 113 may modulatethe encoded data 111 to provide one or more modulated signals 115 to theone or more transmitters 117.

The gNB operations module 182 may provide information 192 to the one ormore transmitters 117. This information 192 may include instructions forthe one or more transmitters 117. For example, the gNB operations module182 may instruct the one or more transmitters 117 when to (or when notto) transmit a signal to the UE(s) 102. The one or more transmitters 117may upconvert and transmit the modulated signal(s) 115 to one or moreUEs 102.

It should be noted that a DL subframe may be transmitted from the gNB160 to one or more UEs 102 and that a UL subframe may be transmittedfrom one or more UEs 102 to the gNB 160. Furthermore, both the gNB 160and the one or more UEs 102 may transmit data in a standard specialsubframe.

It should also be noted that one or more of the elements or partsthereof included in the gNB(s) 160 and UE(s) 102 may be implemented inhardware. For example, one or more of these elements or parts thereofmay be implemented as a chip, circuitry or hardware components, etc. Itshould also be noted that one or more of the functions or methodsdescribed herein may be implemented in and/or performed using hardware.For example, one or more of the methods described herein may beimplemented in and/or realized using a chipset, an application-specificintegrated circuit (ASIC), a large-scale integrated circuit (LSI) orintegrated circuit, etc.

FIG. 2 illustrates various components that may be utilized in a UE 1002.The UE 1002 described in connection with FIG. 2 may be implemented inaccordance with the UE 102 described in connection with FIG. 1. The UE1002 includes a processor 1003 that controls operation of the UE 1002.The processor 1003 may also be referred to as a central processing unit(CPU). Memory 1005, which may include read-only memory (ROM), randomaccess memory (RAM), a combination of the two or any type of device thatmay store information, provides instructions 1007 a and data 1009 a tothe processor 1003. A portion of the memory 1005 may also includenon-volatile random access memory (NVRAM). Instructions 1007 b and data1009 b may also reside in the processor 1003. Instructions 1007 b and/ordata 1009 b loaded into the processor 1003 may also include instructions1007 a and/or data 1009 a from memory 1005 that were loaded forexecution or processing by the processor 1003. The instructions 1007 bmay be executed by the processor 1003 to implement the methods describedabove.

The UE 1002 may also include a housing that contains one or moretransmitters 1058 and one or more receivers 1020 to allow transmissionand reception of data. The transmitter(s) 1058 and receiver(s) 1020 maybe combined into one or more transceivers 1018. One or more antennas1022 a-n are attached to the housing and electrically coupled to thetransceiver 1018.

The various components of the UE 1002 are coupled together by a bussystem 1011, which may include a power bus, a control signal bus and astatus signal bus, in addition to a data bus. However, for the sake ofclarity, the various buses are illustrated in FIG. 2 as the bus system1011. The UE 1002 may also include a digital signal processor (DSP) 1013for use in processing signals. The UE 1002 may also include acommunications interface 1015 that provides user access to the functionsof the UE 1002. The UE 1002 illustrated in FIG. 2 is a functional blockdiagram rather than a listing of specific components.

FIG. 3 illustrates various components that may be utilized in a gNB1160. The gNB 1160 described in connection with FIG. 3 may beimplemented in accordance with the gNB 160 described in connection withFIG. 1. The gNB 1160 includes a processor 1103 that controls operationof the gNB 1160. The processor 1103 may also be referred to as a centralprocessing unit (CPU). Memory 1105, which may include read-only memory(ROM), random access memory (RAM), a combination of the two or any typeof device that may store information, provides instructions 1107 a anddata 1109 a to the processor 1103. A portion of the memory 1105 may alsoinclude non-volatile random access memory (NVRAM). Instructions 1107 band data 1109 b may also reside in the processor 1103. Instructions 1107b and/or data 1109 b loaded into the processor 1103 may also includeinstructions 1107 a and/or data 1109 a from memory 1105 that were loadedfor execution or processing by the processor 1103. The instructions 1107b may be executed by the processor 1103 to implement the methodsdescribed above.

The gNB 1160 may also include a housing that contains one or moretransmitters 1117 and one or more receivers 1178 to allow transmissionand reception of data. The transmitter(s) 1117 and receiver(s) 1178 maybe combined into one or more transceivers 1176. One or more antennas1180 a-n are attached to the housing and electrically coupled to thetransceiver 1176.

The various components of the gNB 1160 are coupled together by a bussystem 1111, which may include a power bus, a control signal bus and astatus signal bus, in addition to a data bus. However, for the sake ofclarity, the various buses are illustrated in FIG. 3 as the bus system1111. The gNB 1160 may also include a digital signal processor (DSP)1113 for use in processing signals. The gNB 1160 may also include acommunications interface 1115 that provides user access to the functionsof the gNB 1160. The gNB 1160 illustrated in FIG. 3 is a functionalblock diagram rather than a listing of specific components.

FIG. 4 is a block diagram illustrating one implementation of a UE 1202in which systems and methods for performing uplink transmissions may beimplemented. The UE 1202 includes transmit means 1258, receive means1220 and control means 1224. The transmit means 1258, receive means 1220and control means 1224 may be configured to perform one or more of thefunctions described in connection with FIG. 1 above. FIG. 2 aboveillustrates one example of a concrete apparatus structure of FIG. 4.Other various structures may be implemented to realize one or more ofthe functions of FIG. 1. For example, a DSP may be realized by software.

FIG. 5 is a block diagram illustrating one implementation of a gNB 1360in which systems and methods for performing uplink transmissions may beimplemented. The gNB 1360 includes transmit means 1317, receive means1378 and control means 1382. The transmit means 1317, receive means 1378and control means 1382 may be configured to perform one or more of thefunctions described in connection with FIG. 1 above. FIG. 3 aboveillustrates one example of a concrete apparatus structure of FIG. 5.Other various structures may be implemented to realize one or more ofthe functions of FIG. 1. For example, a DSP may be realized by software.

FIG. 6 is a diagram illustrating one example of a resource grid. Theresource grid illustrated in FIG. 6 may be applicable for both downlinkand uplink and may be utilized in some implementations of the systemsand methods disclosed herein. More detail regarding the resource grid isgiven in connection with FIG. 1.

In FIG. 6, one subframe 269 may include one or several slots 283. For agiven numerology μ, N^(μ) _(RB) is bandwidth configuration of theserving cell, expressed in multiples of N^(RB) _(sc), where N^(RB) _(sc)is a resource block 289 size in the frequency domain expressed as anumber of subcarriers, and N^(SF,μ) _(symb) is the number of OrthogonalFrequency Division Multiplexing (OFDM) symbols 287 in a subframe 269. Inother words, For each numerology μ and for each of downlink and uplink,a resource grid of N^(μ) _(RB)N^(RB) _(sc) subcarriers and N^(SF,μ)_(symb) OFDM symbols may be defined. There may be one resource grid perantenna port p, per subcarrier spacing configuration (i.e. numerology)μ, and per transmission direction (uplink or downlink). A resource block289 may include a number of resource elements (RE) 291.

Multiple OFDM numerologies (also referred to as just numerologies) aresupported as given by Table X1. Each of the numerologies may be tied toits own subcarrier spacing Δf.

TABLE X1 μ Δf = 2^(μ) · 15 [kHz] Cyclic prefix 0 15 Normal 1 30 Normal 260 Normal, Extended 3 120 Normal 4 240 Normal 5 480 Normal

For subcarrier spacing configuration μ, slots are numbered n^(μ)_(s)∈(0, . . . , N^(SF,μ) _(slot)−1) in increasing order within asubframe and n^(μ) _(s,f)∈(0, . . . , N^(frame,μ) _(slot)−1) inincreasing order within a frame. There are N^(slot,μ) _(symb)consecutive OFDM symbols in a slot where N^(slot,μ) _(symb) depends onthe subcarrier spacing used and the slot configuration as given by TableX2 for normal cyclic prefix and Table X3 for extended cyclic prefix. Thenumber of consecutive OFDM symbols per subframe is N^(SF,μ)_(symb)=N^(slot,μ) _(symb)·N^(SF,μ) _(slot). The start of slot n^(μ)_(s) in a subframe is aligned in time with the start of OFDM symboln^(μ) _(s) N^(slot,μ) _(symb) in the same subframe. Not all UEs may becapable of simultaneous transmission and reception, implying that notall OFDM symbols in a downlink slot or an uplink slot may be used.

TABLE X2 Slot configuration 0 1 μ N^(slot, μ) _(symb) N^(frame, μ)_(slot) N^(SF, μ) _(slot) N^(slot, μ) _(symb) N^(frame, μ) _(slot)N^(SF, μ) _(slot) 0 14 10 1 7 20 2 1 14 20 2 7 40 4 2 14 40 4 7 80 8 314 80 8 — — — 4 14 160 16 — — — 5 14 320 32 — — —

TABLE X3 Slot configuration 0 1 μ N^(slot, μ) _(symb) N^(frame, μ)_(slot) N^(SF, μ) _(slot) N^(slot, μ) _(symb) N^(frame, μ) _(slot)N^(SF, μ) _(slot) 2 12 40 4 6 80 8

For a PCell, N^(μ) _(RB) is broadcast as a part of system information.For an SCell (including a Licensed-Assisted Access (LAA) SCell), N^(μ)_(RB) is configured by a RRC message dedicated to a UE 102. For PDSCHmapping, the available RE 291 may be the RE 291 whose index l fulfilsl≥l_(data,start) and/or l_(data,end)≥l in a subframe.

The OFDM access scheme with cyclic prefix (CP) may be employed, whichmay be also referred to as CP-OFDM. In the downlink, PDCCH, EPDCCH(Enhanced Physical Downlink Control Channel), PDSCH and the like may betransmitted. A radio frame may include a set of subframes 269 (e.g. 10subframes). The RB is a unit for assigning downlink radio resources,defined by a predetermined bandwidth (RB bandwidth) and one or more OFDMsymbols.

A resource block is defined as N^(RB) _(sc)=¹² consecutive subcarriersin the frequency domain.

Carrier resource blocks are numbered from 0 to N^(μ) _(RB)−1 in thefrequency domain for subcarrier spacing configuration. The relationbetween the carrier resource block number n_(CRB) in the frequencydomain and resource elements (k,l) is given by n_(CRB)=floor(k/N^(RB)_(sc)) where k is defined relative to the resource grid. Physicalresource blocks are defined within a carrier bandwidth part (BWP) andnumbered from 0 to N^(size) _(BWP,i)−1 where i is the number of thecarrier bandwidth part. The relation between physical and absoluteresource blocks in carrier bandwidth part i is given byn_(CRB)=n_(PRB)+N^(start) _(BWP,i)−1, where N^(start) _(BWP,i) is thecarrier resource block where carrier bandwidth part starts. Virtualresource blocks are defined within a carrier bandwidth part and numberedfrom 0 to N^(size) _(BWP,i)−1 where i is the number of the carrierbandwidth part.

A carrier bandwidth part is a contiguous set of physical resourceblocks, selected from a contiguous subset of the carrier resource blocksfor a given numerology μ on a given carrier. The number of resourceblocks N^(size) _(BWP,i) in a carrier BWP may fulfil N^(min,μ)_(RB,x)<=N^(size) _(BWP,i)<=N^(max,μ) _(RB,x). A UE can be configuredwith up to four carrier bandwidth parts in the downlink with a singledownlink carrier bandwidth part being active at a given time. The UE isnot expected to receive PDSCH or PDCCH outside an active bandwidth part.A UE can be configured with up to four carrier bandwidth parts in theuplink with a single uplink carrier bandwidth part being active at agiven time. The UE shall not transmit PUSCH or PUCCH outside an activebandwidth part.

The RB may include twelve sub-carriers in frequency domain and one ormore OFDM symbols in time domain. A region defined by one sub-carrier infrequency domain and one OFDM symbol in time domain is referred to as aresource element (RE) and is uniquely identified by the index pair(k,l^(RG)) in the resource grid, where k=0 . . . , N^(μ) _(RB)N^(RB)_(sc)−1 and l^(RG)=0, . . . , N^(SF,μ) _(symb)−1 are indices in thefrequency and time domains, respectively. Moreover, RE is uniquelyidentified by the index pair (k,l) based on a certain reference point,where l are indices in the time domain. The reference point can be basedon the resource grid, i.e. component carrier (CC) basis. Alternativelythe reference point can be based on a certain band width part in thecomponent carrier. While subframes in one CC are discussed herein,subframes are defined for each CC and subframes are substantially insynchronization with each other among CCs.

In the uplink, in addition to CP-OFDM, a Single-Carrier FrequencyDivision Multiple Access (SC-FDMA) access scheme may be employed, whichis also referred to as Discrete Fourier Transform-Spreading OFDM(DFT-S-OFDM). In the uplink, PUCCH, PDSCH, Physical Random AccessChannel (PRACH) and the like may be transmitted.

For each numerology and carrier, a resource grid of N^(max,μ)_(RB,x)N^(RB) _(sc) subcarriers and N^(SF,μ) _(symb) OFDM symbols isdefined, where N^(max,μ) _(RB,x) is given by Table X4 and x is DL or ULfor downlink and uplink, respectively. There is one resource grid perantenna port p, per subcarrier spacing configuration μ, and pertransmission direction (downlink or uplink).

TABLE X4 μ N^(min,μ) _(RB,DL) N^(max,μ) _(RB,DL) N^(min,μ) _(RB,UL)N^(max,μ) _(RB,UL) 0 20 275 24 275 1 20 275 24 275 2 20 275 24 275 3 20275 24 275 4 20 138 24 138 5 20 69 24 69

A UE 102 may be instructed to receive or transmit using a subset of theresource grid only. The set of resource blocks a UE is referred to as acarrier bandwidth part and may be configured to receive or transmit uponare numbered from 0 to N^(μ) _(RB)−1 in the frequency domain. The UE maybe configured with one or more carrier bandwidth parts, each of whichmay have the same or different numerology.

Transmissions in multiple cells can be aggregated where up to fifteensecondary cells can be used in addition to the primary cell. A UE 102configured for operation in bandwidth parts (BWPs) of a serving cell, isconfigured by higher layers for the serving cell a set of at most fourbandwidth parts (BWPs) for receptions by the UE (DL BWP set) in a DLbandwidth by parameter DL-BWP-index and a set of at most four BWPs fortransmissions by the UE 102 (UL BWP set) in an UL bandwidth by parameterUL-BWP-index for the serving cell. For unpaired spectrum operation, a DLBWP from the set of configured DL BWPs is linked to an UL BWP from theset of configured UL BWPs, where the DL BWP and the UL BWP have a sameindex in the respective sets. For unpaired spectrum operation, a UE 102can expect that the center frequency for a DL BWP is same as the centerfrequency for a UL BWP.

One or more sets of PRB(s) may be configured for DL control channelmonitoring. In other words, a control resource set is, in the frequencydomain, a set of PRBs within which the UE 102 attempts to blindly decodedownlink control information (i.e., monitor downlink control information(DCI)), where the PRBs may or may not be frequency contiguous, a UE 102may have one or more control resource sets, and one DCI message may belocated within one control resource set. In the frequency-domain, a PRBis the resource unit size (which may or may not include DMRS) for acontrol channel. A DL shared channel may start at a later OFDM symbolthan the one(s) which carries the detected DL control channel.Alternatively, the DL shared channel may start at (or earlier than) anOFDM symbol than the last OFDM symbol which carries the detected DLcontrol channel. In other words, dynamic reuse of at least part ofresources in the control resource sets for data for the same or adifferent UE 102, at least in the frequency domain may be supported.

Namely, a UE 102 may have to monitor a set of PDCCH candidates in one ormore control resource sets on one or more activated serving cells orbandwidth parts (BWPs) according to corresponding search spaces wheremonitoring implies decoding each PDCCH candidate according to themonitored DCI formats. Here, the PDCCH candidates may be candidates forwhich the PDCCH may possibly be assigned and/or transmitted. A PDCCHcandidate is composed of one or more control channel elements (CCEs).The term “monitor” means that the UE 102 attempts to decode each PDCCHin the set of PDCCH candidates in accordance with all the DCI formats tobe monitored.

The set of PDCCH candidates that the UE 102 monitors may be alsoreferred to as a search space. That is, the search space is a set ofresource that may possibly be used for PDCCH transmission.

Furthermore, a common search space (CSS) and a user-equipment searchspace (USS) are set (or defined, configured) in the PDCCH resourceregion. For example, the CSS may be used for transmission of DCI to aplurality of the UEs 102. That is, the CSS may be defined by a resourcecommon to a plurality of the UEs 102. For example, the CSS is composedof CCEs having numbers that are predetermined between the gNB 160 andthe UE 102. For example, the CSS is composed of CCEs having indices 0 to15.

Here, the CSS may be used for transmission of DCI to a specific UE 102.That is, the gNB 160 may transmit, in the CSS, DCI format(s) intendedfor a plurality of the UEs 102 and/or DCI format(s) intended for aspecific UE 102. There may be one or more types of CSS. For example,Type 0 PDCCH CSS may be defined for a DCI format scrambled by a SystemInformation-Radio Network Temporary Identifier (SI-RNTI) on PCell. Type1 PDCCH CSS may be defined for a DCI format scrambled by a RandomAccess- (RA-)RNTI. Additionally and/or alternatively, Type 1 PDCCH CSSmay be used for a DCI format scrambled by a Temporary Cell- (TC-)RNTI orCell- (C-)RNTI. Type 2 PDCCH CSS may be defined for a DCI formatscrambled by a Paging- (P-)RNTI. Type 3 PDCCH CSS may be defined for aDCI format scrambled by an Interval- (INT-)RNTI, where if a UE 102 isconfigured by higher layers to decode a DCI format with CRC scrambled bythe INT-RNTI and if the UE 102 detects the DCI format with CRC scrambledby the INT-RNTI, the UE 102 may assume that no transmission to the UE102 is present in OFDM symbols and resource blocks indicated by the DCIformat. Additionally and/or alternatively, Type 3 PDCCH CSS may be usedfor a DCI format scrambled by the other RNTI (e.g. Transmit PowerControl- (TPC-)RNTI, Pre-emption Indication- (PI-)RNTI, Slot Format-(SF-)RNTI, Semi persistent scheduling- (SPS-)RNTI, Grant free-(GF-)RNTI).

A UE may be indicated by System Information Block Type0 (SIB0), which isalso referred to as MIB, a control resource set for Type0-PDCCH commonsearch space and a subcarrier spacing and a CP length for PDCCHreception. The Type0-PDCCH common search space is defined by the CCEaggregation levels and the number of candidates per CCE aggregationlevel. The UE may assume that the DMRS antenna port associated withPDCCH reception in the Type0-PDCCH common search space and the DMRSantenna port associated with Physical Broadcast channel (PBCH) receptionare quasi-collocated with respect to delay spread, Doppler spread,Doppler shift, average delay, and spatial Rx parameters. PBCH carriesMaster Information Block (MIB) which contains most important pieces ofsystem information. A PDCCH with a certain DCI format in Type0-PDCCHcommon search space schedules a reception of a PDSCH with SIB Type1(SIB1) or with other SI messages. A UE may be indicated by SIB1 controlresource set(s) for Type1-PDCCH common search space. A subcarrierspacing and a CP length for PDCCH reception with Type1-PDCCH commonsearch space are same as for PDCCH reception with Type0-PDCCH commonsearch space. The UE may assume that the DMRS antenna port associatedwith PDCCH reception in the Type1-PDCCH common search space and the DMRSantenna port associated with PBCH reception are quasi-collocated withrespect to delay spread, Doppler spread, Doppler shift, average delay,and spatial Rx parameters. A monitoring periodicity of paging occasionsfor PDCCH in Type2-PDCCH common search space may be configured to the UEby higher layer parameter. A UE may be configured by higher layersignaling whether and/or which serving cell(s) to monitor Type3-PDCCHcommon search space.

The USS may be used for transmission of DCI to a specific UE 102. Thatis, the USS is defined by a resource dedicated to a certain UE 102. Thatis, the USS may be defined independently for each UE 102. For example,the USS may be composed of CCEs having numbers that are determined basedon a RNTI assigned by the gNB 160, a slot number in a radio frame, anaggregation level, or the like.

Here, the RNTI(s) may include C-RNTI (Cell-RNTI), Temporary C-RNTI.Also, the USS (the position(s) of the USS) may be configured by the gNB160. For example, the gNB 160 may configure the USS by using the RRCmessage. That is, the base station may transmit, in the USS, DCIformat(s) intended for a specific UE 102.

Here, the RNTI assigned to the UE 102 may be used for transmission ofDCI (transmission of PDCCH). Specifically, CRC (Cyclic Redundancy Check)parity bits (also referred to simply as CRC), which are generated basedon DCI (or DCI format), are attached to DCI, and, after attachment, theCRC parity bits are scrambled by the RNTI. The UE 102 may attempt todecode DCI to which the CRC parity bits scrambled by the RNTI areattached, and detects PDCCH (i.e., DCI, DCI format). That is, the UE 102may decode PDCCH with the CRC scrambled by the RNTI.

When the control resource set spans multiple OFDM symbols, a controlchannel candidate may be mapped to multiple OFDM symbols or may bemapped to a single OFDM symbol. One DL control channel element may bemapped on REs defined by a single PRB and a single OFDM symbol. If morethan one DL control channel elements are used for a single DL controlchannel transmission, DL control channel element aggregation may beperformed.

The number of aggregated DL control channel elements is referred to asDL control channel element aggregation level. The DL control channelelement aggregation level may be 1 or 2 to the power of an integer. ThegNB 160 may inform a UE 102 of which control channel candidates aremapped to each subset of OFDM symbols in the control resource set. Ifone DL control channel is mapped to a single OFDM symbol and does notspan multiple OFDM symbols, the DL control channel element aggregationis performed within an OFDM symbol, namely multiple DL control channelelements within an OFDM symbol are aggregated. Otherwise, DL controlchannel elements in different OFDM symbols can be aggregated.

DCI formats may be classified into at least 4 types, DL regular, ULregular, DL fallback and UL fallback. The DL regular DCI format and theUL regular DCI format may have a same DCI payload size. The DL fallbackDCI format and the UL fallback DCI format may have a same DCI payloadsize. Table X5, X6, X7, and X8 show examples of the DL regular DCIformat, the UL regular DCI format, the DL fallback DCI format, and theUL fallback DCI format, respectively. “Mandatory” may mean theinformation field is always present irrespective of RRC(re)configuration. “Optional” may mean the information field may or maynot be present depending on RRC (re)configuration. In the DL fallbackDCI format and the UL fallback DCI format, all information fields aremandatory so that their DCI payload sizes are fixed irrespective of RRC(re)configuration.

TABLE X5 Information The number Mandatory/ field of bits OptionalRemarks Header 2 Mandatory The header is used to distinguish differentDCI formats with the same DCI size Carrier 0 or 3 Optional indicatorFrequency- 25  Mandatory VRBs, indiacated using type 0 or type 1 domainresource allocation PDSCH resources Time-domain 2 Mandatory Index intoan RRC-configured table PDSCH providing the set of OFDM symbols usedresources for PDSCH transmission VRB-to-PRB 1 Optional Flag to controlVRB-to-PRB mapping mapping Reserved 1 Optional Indicate whether reservedresources should resources be excluded form the PDSCH allocation.Bundling size 1 Optional Select from two RRC configured bundling siesfor PDSCH Modulation 5 Mandatory MCS and coding scheme New data 1Mandatory indicator Redundancy 2 Mandatory version Modulation 0 or 5Optional and coding scheme, second CW New data 0 or 1 Optionalindicator, second CW Redundancy 0 or 2 Optional version, second CW HARQ3 Mandatory process number CBGFI 1 Optional Code block group (CBG) flushindication. Consists of 1 bit if CBG retransmission configured. CBGTI 4Optional Indicates the CBG(s) (re)transmitted. Consists of N bits bitmapif CBG is configured. TPC 2 Mandatory command for PUCCH ARI 2 Mandatory(ACK/NAK Resource Index) HARQ timing 2 To indicate the timing of the ACKrelative indicator to the PDSCH reception Downlink 4 Optional DAI(counter DAI and total DAI) Assignment Index Antenna 2 Optional Antennaports used (and the number of port(s) layers) TCI 2 Optional Providesbeam indication to indicate QCL (Transmission assumption between DL RSantenna port(s) Configuration and DMRS antenna port(s) of DL dataIndication) channel at least w.r.t. spatial QCL parameter CSI request 4Optional CSI measurement request and CSI report trigger for CSI on PUCCH

TABLE X6 Information The number Mandatory/ field of bits OptionalRemarks Header 2 Mandatory The header is used to distinguish differentDCI formats with the same DCI size Carrier 0 Optional indicatorFrequency- 25  Mandatory VRBs, indiacated using type 0 or type 1 domainresource allocation PDSCH resources Time-domain 2 Mandatory Index intoan RRC-configured table PDSCH providing the set of OFDM symbols usedresources for PUSCH transmission VRB-to-PRB 1 Mandatory Flag to controlVRB-to-PRB mapping mapping UCI on 2 Optional Indication of beta valuefor UCI on PUSCH PUSCH, possibly also other UCI-on- informationPUSCH-related information Modulation 5 Mandatory MCS and coding schemeNew data 1 Mandatory indicator Redundancy 2 Mandatory version HARQprocess 3 Mandatory HARQ process number, 3 or 4 bits number CBGTI 4Optional Indicates the CBG(s) (re)transmitted. Consists of N bits bitmapif CBG is configured. TPC command 2 Mandatory for PUSCH SRI/TRI/TPMI 4Optional SRS resource indicator, TPMI, and Transmission rank indicatorjointly encoded. At least 4 bits is used with 1 SRS resource. Antennaports 2 Optional Antenna ports, scrambling identity SRS request 4Optional To trigger an SRS transmission in the uplink. CSI request 4Mandatory CSI measurement request and CSI report trigger for CSI onPUSCH

TABLE X7 Information The number Mandatory/ field of bits OptionalRemarks Header 2 Mandatory The header is used to distinguish differentDCI formats with the same DCI size Frequency- 15  Mandatory VRBsindicated using type 1. Fixed BW or domain dependent on some BW providedby PDSCH sysinfo (cannot be reconfigurable for the resources fallbackformat) Time-domain 2 Mandatory Index into an preconfigured tableproviding PDSCH the set of OFDM symbols used for PDSCH resourcestransmission VRB-to-PRB 1 Mandatory Flag to control VRB-to-PRB mappingmapping Reserved 1 Mandatory Indicate whether reserved resources shouldresources be excluded form the PDSCH allocation. Modulation 5 MandatoryOnly single-layer transmission in fallback and coding scheme New data 1Mandatory indicator Redundancy 2 Mandatory version HARQ 3 Mandatoryprocess number TPC 2 Mandatory command for PUCCH ARI 2 Mandatory(ACK/NAK Resource Index) Downlink 2 Mandatory Assignment Index Antenna 2Mandatory port(s) TCI 2 (Transmission Configuration Information)

TABLE X8 Information The number Mandatory/ field of bits OptionalRemarks Header 2 Mandatory The header is used to distinguish differentDCI formats with the same DCI size Frequency- 15  Mandatory VRBsindicated using type 1. Fixed BW domain or dependent on some BW providedby PUSCH sysinfo (cannot be reconfigurable for the resources fallbackformat) Time-domain 2 Mandatory Index into an preconfigured table PUSCHproviding the set of OFDM symbols used resources for PDSCH transmissionVRB-to-PRB 1 Mandatory Flag to control VRB-to-PRB mapping mappingModulation 5 Mandatory Only single-layer transmission in fallback andcoding scheme New data 1 Mandatory indicator Redundancy 2 Mandatoryversion HARQ process 3 Mandatory number TPC command 2 Mandatory forPUSCH SRI/TRI/TPMI 4 Mandatory AP/ID/layers 2 Mandatory

FIG. 7 shows examples of several numerologies. The numerology #1 (μ=0)may be a basic numerology. For example, a RE of the basic numerology isdefined with subcarrier spacing of 15 kHz in frequency domain and2048κTs+CP length (e.g., 512κTs, 160κTs or 144κTs) in time domain, whereTs denotes a baseband sampling time unit defined as 1/(15000*2048)seconds. For the μ-th numerology, the subcarrier spacing may be equal to15*2^(μ) and the effective OFDM symbol length NuTs=2048*2⁻⁸² κTs. It maycause the symbol length is 2048*2⁻⁸² κTs+CP length (e.g., 512*2⁻⁸² κTs,160*2⁻⁸² κTs or 144*2⁻⁸² κTs). Note that κ=64, Ts=1/(Δf_(max)·N_(f)),Δf_(max)=480·10³ Hz (i.e. Δf for μ=5), and N_(f)=4096. In other words,the subcarrier spacing of the μ+1-th numerology is a double of the onefor the μ-th numerology, and the symbol length of the μ+1-th numerologyis a half of the one for the μ-th numerology. FIG. 7 shows fournumerologies, but the system may support another number of numerologies.

FIG. 8 shows a set of examples of subframe structures for thenumerologies that are shown in FIG. 7. These examples are based on theslot configuration set to 0. A slot includes 14 symbols, the slot lengthof the μ+1-th numerology is a half of the one for the μ-th numerology,and eventually the number of slots in a subframe (i.e., 1 ms) becomesdouble. It may be noted that a radio frame may include 10 subframes, andthe radio frame length may be equal to 10 ms.

FIG. 9 shows another set of examples of subframe structures for thenumerologies that are shown in FIG. 7. These examples are based on theslot configuration set to 1. A slot includes 7 symbols, the slot lengthof the μ+1-th numerology is a half of the one for the μ-th numerology,and eventually the number of slots in a subframe (i.e., 1 ms) becomesdouble.

FIG. 10 shows examples of slots and sub-slots. If sub-slot (i.e. timedomain resource allocation in unites of OFDM symbol or a set of a fewOFDM symbols) is not configured by higher layer, the UE 102 and the gNB160 may only use a slot as a scheduling unit. More specifically, a giventransport block may be allocated to a slot. If the sub-slot isconfigured by higher layer, the UE 102 and the gNB 160 may use thesub-slot as well as the slot. The sub-slot may include one or more OFDMsymbols. The maximum number of OFDM symbols that constitute the sub-slotmay be N^(SF,μ) _(symb)−1. The sub-slot length may be configured byhigher layer signaling. Alternatively, the sub-slot length may beindicated by a physical layer control channel (e.g., by DCI format). Thesub-slot may start at any symbol within a slot unless it collides with acontrol channel. There could be restrictions of mini-slot length basedon restrictions on starting position. For example, the sub-slot with thelength of N^(SF,μ) _(symb)−1 may start at the second symbol in a slot.The starting position of a sub-slot may be indicated by a physical layercontrol channel (e.g., by DCI format). Alternatively, the startingposition of a sub-slot may be derived from information (e.g., searchspace index, blind decoding candidate index, frequency and/or timeresource indices, PRB index, a control channel element index, controlchannel element aggregation level, an antenna port index, etc) of thephysical layer control channel which schedules the data in the concernedsub-slot. In cases when the sub-slot is configured, a given transportblock may be allocated to either a slot, a sub-slot, aggregatedsub-slots or aggregated sub-slot(s) and slot. This unit may also be aunit for HARQ-ACK bit generation.

FIG. 11 shows examples of scheduling timelines. For a normal DLscheduling timeline, DL control channels are mapped the initial part ofa slot. The DL control channels schedule DL shared channels in the sameslot. HARQ-ACKs for the DL shared channels (i.e., HARQ-ACKs each ofwhich indicates whether or not transport block in each DL shared channelis detected successfully) are reported via UL control channels in alater slot. In this instance, a given slot may contain either one of DLtransmission and UL transmission. For a normal UL scheduling timeline,DL control channels are mapped the initial part of a slot. The DLcontrol channels schedule UL shared channels in a later slot. For thesecases, the association timing (time shift) between the DL slot and theUL slot may be fixed or configured by higher layer signaling.Alternatively, it may be indicated by a physical layer control channel(e.g., the DL assignment DCI format, the UL grant DCI format, or anotherDCI format such as UE-common signaling DCI format which may be monitoredin common search space).

For a self-contained base DL scheduling timeline, DL control channelsare mapped the initial part of a slot. The DL control channels schedulesDL shared channels in the same slot. HARQ-ACKs for the DL sharedchannels are reported UL control channels which are mapped at the endingpart of the slot. For a self-contained base UL scheduling timeline, DLcontrol channels are mapped the initial part of a slot. The DL controlchannels schedules UL shared channels in the same slot. For these cases,the slot may contain DL and UL portions, and there may be a guard periodbetween the DL and UL transmissions. The use of self-contained slot maybe upon a configuration of self-contained slot. Alternatively, the useof self-contained slot may be upon a configuration of the sub-slot. Yetalternatively, the use of self-contained slot may be upon aconfiguration of shortened physical channel (e.g., PDSCH, PUSCH, PUCCH,etc.).

Slot format indicator (SFI) may be defined to specify a format for oneor more slot(s). With SFI, the UE 102 may be able to derive at leastwhich symbols in a given slot that are ‘DL’, ‘UL’, and ‘unknown’,respectively. In addition, it may also indicate which symbols in a givenslot that are ‘reserved’. With SFI, the UE 102 may also be able toderive the number of slots for which the SFI indicates their formats.SFI may be configured by dedicated RRC configuration message.Alternatively and/or additionally, SFI may be signaled by a group-commonPDCCH (e.g. PDCCH with SF-RNTI). Yet alternatively and/or additionally,SFI may be broadcasted via master information block (MIB) or remainingminimum system information (RMSI).

For example, 3 bit SFI can express up to 8 combinations of ‘DL’, ‘UL’,‘Unknown’ and ‘reserved’, each combination consists of N^(slot,μ)_(symb) pieces of symbol types. More specifically, given that N^(slot,μ)_(symb)=14, one combination may be ‘Unknown’ ‘Unknown’ ‘Unknown’‘Unknown’ ‘Unknown’ ‘Unknown’ ‘Unknown’ ‘Unknown’ ‘Unknown’ ‘Unknown’‘Unknown’ ‘Unknown’ ‘Unknown’ ‘Unknown’. Another combination may be all‘DL, that is ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’‘DL’ ‘DL’. Yet another combination may be all ‘UL, that is ‘UL’ ‘UL’‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’ ‘UL’. Yet anothercombination may be a combination of ‘DL’, ‘UL’ and ‘Reserved’ such as‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘DL’ ‘Reserved’ ‘Reserved’ ‘Reserved’‘Reserved’ ‘UL’.

‘DL’ symbols may be available for DL receptions and CSI/RRM measurementsat the UE 102 side. ‘UL’ symbols may be available for UL transmissionsat the UE 102 side. ‘Unknown’ resource may also be referred to as‘flexible’ and can be overridden by at least by DCI indication.‘Unknown’ may be used to achieve the same as ‘Reserved’ if notoverridden by DCI and/or SFI indication. ‘Reserved’ resource may be ‘nottransmit’ and ‘not receive’ but cannot be overridden by DCI/SFIindication. On ‘Unknown’ symbols, UE 102 may not be allowed to assumeany DL and UL transmissions which are configured by higher-layer but notindicated by DCI/SFI indications, for example, periodic CSI-RS, periodicCSI-IM, semi-persistently scheduled CSI-RS, periodic CSI reporting,semi-persistently scheduled CSI reporting, periodic SRS transmission,higher-layer configured Primary synchronization signal (PSS)/secondarySS (SSS)/PBCH.

The overriding of ‘Unknown’ symbols by the DCI means that UE 102 mayhave to assume only DL and UL transmissions (PDSCH transmission, PUSCHtransmission, aperiodic CSI-RS transmission, aperiodic CSI-IM resource,aperiodic SRS transmission) which are indicated by DCI indications. Theoverriding of ‘Unknown’ symbols by the SFI means that UE 102 may have toassume the symbols as either ‘DL’, ‘UL’, or ‘Reserved’ according to SFIindications. If the UE 102 assumes aperiodic CSI-RS transmission and/oraperiodic CSI-IM resource, the UE 102 may perform CSI and/or RRMmeasurement based on the aperiodic CSI-RS transmission and/or aperiodicCSI-IM resource. If the UE 102 does not assume aperiodic CSI-RStransmission and/or aperiodic CSI-IM resource, the UE 102 may not usethe aperiodic CSI-RS transmission and/or aperiodic CSI-IM resource forCSI and/or RRM measurement.

If the serving cell is TDD cell and is DL only cell (a serving cell withdownlink component carrier but without uplink component carrier), UE 102may interpret ‘UL’ indicated by SFI as ‘Unknown’. Alternatively, if theserving cell is TDD cell and is DL only cell, UE 102 may interpret ‘UL’indicated by SFI as ‘Reserved. If the serving cell is TDD cell and is ULonly cell (a serving cell without downlink component carrier but withuplink component carrier), UE 102 may interpret ‘DL’ indicated by SFI as‘Unknown’. Alternatively, if the serving cell is TDD cell and is UL onlycell, UE 102 may interpret ‘DL’ indicated by SFI as ‘Reserved.

If the UE 102 detects PDCCH which indicate time domain resourceallocation for the scheduled PDSCH includes ‘Unknown’ symbol(s), the UE102 may assume the PDSCH is mapped on the ‘Unknown’ symbol(s). In thiscase, there are several options to handle the other DL transmission(e.g. aperiodic CSI-RS transmission, aperiodic CSI-IM resource) on the‘Unknown’ symbol(s). The first option is that the UE 102 does not assumeany other DL transmissions on the ‘Unknown’ symbol(s) except for thescheduled PDSCH. The second option is that the UE 102 assumes the otherDL transmissions on the ‘Unknown’ symbol(s) within the resources whichare allocated for the scheduled PDSCH. The UE 102 does not assume anyother DL transmissions on the ‘Unknown’ symbol(s) outside the resourceswhich are allocated for the scheduled PDSCH. The third option is thatthe UE 102 assumes the other DL transmissions on the ‘Unknown’ symbol(s)irrespective of resource allocation for the PDSCH. In other words, the‘Unknown’ symbol(s) is interpreted as ‘DL’.

The UE 102 may have to monitor PDCCH on some ‘Unknown’ symbols. Theremay be several options to monitor PDCCH. If all of the OFDM symbolswhich are assigned for a given control resource set (CORESET) are ‘DL’,the UE 102 may assume all of the OFDM symbols are valid for monitoringof a PDCCH associated with the given CORESET. In this case, the UE 102may assume each PDCCH candidate in the CORESET is mapped to all of theOFDM symbols for time-first RE group (REG)-to-control channel element(CCE) mapping. If all of the OFDM symbols which are assigned for a givenCORESET are ‘Unknown’, the UE 102 may assume all of the OFDM symbols arevalid for monitoring of a PDCCH associated with the given CORESET. Inthis case, the UE 102 may assume each PDCCH candidate in the CORESET ismapped to all of the OFDM symbols for time-first REG-to-CCE mapping.

If every OFDM symbols which is assigned for a given CORESET is either‘UL’ or ‘Reserved’, the UE 102 may assume those OFDM symbols are notvalid for monitoring of a PDCCH associated with the given CORESET. Ifsome of the OFDM symbols which are assigned for a given CORESET are ‘DL’and the others are ‘UL’ or ‘Reserved’ or if some of the OFDM symbolswhich are assigned for a given CORESET are ‘Unknown’ and the others are‘UL’ or ‘Reserved’, the UE 102 may assume only the ‘DL’ or ‘Unknown’OFDM symbols are valid for monitoring of a PDCCH associated with thegiven CORESET. In this case, the UE 102 may assume each PDCCH candidatein the CORESET duration is mapped to all of the ‘DL’ OFDM symbols butnot to ‘UL’ or ‘Reserved’ symbols. In other words, the UE 102 may assumea shortened CORESET duration than the CORESET duration which isconfigured by higher layer.

If some of the OFDM symbols which are assigned for a given CORESET are‘DL’ and the others are ‘Unknown’, the UE 102 may assume all of the‘DL’/‘Unknown’ OFDM symbols are valid for monitoring of a PDCCHassociated with the given CORESET. In this case, the UE 102 may assumeeach PDCCH candidate in the CORESET duration is mapped to all of the‘DL’/‘Unknown’ OFDM symbols, and a single PDCCH candidate may be allowedto be mapped across ‘DL’ and ‘Unknown’ OFDM symbols. Alternatively, ifsome of the OFDM symbols which are assigned for a given CORESET are ‘DL’and the others are ‘Unknown’, the UE 102 may assume only the ‘DL’ OFDMsymbols are valid for monitoring of a PDCCH associated with the givenCORESET. In this case, the UE 102 may assume each PDCCH candidate in theCORESET duration is mapped to only the ‘DL’ OFDM symbols but not to‘Unknown’ symbols. In other words, the UE 102 may not assume that asingle PDCCH candidate is mapped across ‘DL’ and ‘Unknown’ OFDM symbols.Yet alternatively, which assumption the UE 102 follows may be set perCORESET. Alternatively and/or additionally, if ‘DL’ symbols areseparated into more than one symbol sets by ‘Unknown’ within a givenCORESET, the UE 102 may assume only the first (i.e. the earliest) ‘DL’OFDM symbol set is valid for monitoring of a PDCCH associated with thegiven CORESET.

FIG. 12 is a block diagram illustrating one implementation of a gNB1260. The gNB 1260 may include a higher layer processor 1223, a DLtransmitter 1225, a UL receiver 1233, and antennas 1231. The DLtransmitter 1225 may include a PDCCH transmitter 1227 and a PDSCHtransmitter 1229. The UL receiver 1233 may include a PUCCH 1235 receiverand a PUSCH receiver 1237. The higher layer processor 1223 may managephysical layer's behaviors (the DL transmitter's and the UL receiver'sbehaviors) and provide higher layer parameters to the physical layer.The higher layer processor 1223 may obtain transport blocks from thephysical layer. The higher layer processor 1223 may send/acquire higherlayer messages such as an RRC message and MAC message to/from a UE'shigher layer. The higher layer processor 1223 may provide the PDSCHtransmitter 1229 transport blocks and provide the PDCCH transmitter 1227transmission parameters related to the transport blocks. The UL receiver1233 may receive multiplexed uplink physical channels and uplinkphysical signals via receiving antennas 1231 and de-multiplex them. ThePUCCH receiver 1235 may provide the higher layer processor UCI. ThePUSCH receiver 1237 may provide the higher layer processor receivedtransport blocks.

FIG. 13 is a block diagram illustrating one implementation of a UE 1302.The UE 1302 may include a higher layer processor 1323, a UL transmitter1351, a DL receiver 1343, and antennas 1331. The UL transmitter 1351 mayinclude a PUCCH transmitter 1353 and a PUSCH transmitter 1355. The DLreceiver 1343 may include a PDCCH receiver 1345 and a PDSCH receiver1347. The higher layer processor 1323 may manage physical layer'sbehaviors (the UL transmitter's and the DL receiver's behaviors) andprovide higher layer parameters to the physical layer. The higher layerprocessor 1323 may obtain transport blocks from the physical layer. Thehigher layer processor 1323 may send/acquire higher layer messages suchas an RRC message and MAC message to/from a UE's higher layer. Thehigher layer processor 1323 may provide the PUSCH transmitter 1355transport blocks and provide the PUCCH transmitter 1353 UCI. The DLreceiver 1343 may receive multiplexed downlink physical channels anddownlink physical signals via receiving antennas 1331 and de-multiplexthem. The PDCCH receiver 1345 may provide the higher layer processor1323 DCI. The PDSCH receiver 1347 may provide the higher layer processor1323 received transport blocks.

For downlink data transmission, the UE 102 may attempt blind decoding ofone or more PDCCH (also referred to just as control channel) candidates.This procedure is also referred to as monitoring of PDCCH. The PDCCH maycarry DCI format which schedules PDSCH (also referred to just as sharedchannel or data channel). The gNB 160 may transmit PDCCH and thecorresponding PDSCH in a downlink slot. Upon the detection of the PDCCHin a downlink slot, the UE 102 may receive the corresponding PDSCH inthe downlink slot. Otherwise, the UE 102 may not perform PDSCH receptionin the downlink slot.

FIG. 14 illustrates an example of control resource unit and referencesignal structure. A control resource set may be defined, in frequencydomain, as a set of physical resource block(s) (PRBs). For example, acontrol resource set may include PRB#i to PRB#i+3 in frequency domain.The control resource set may also be defined, in time domain, as a setof OFDM symbol(s). It may also be referred to as a duration of thecontrol resource set or just control resource set duration. For example,a control resource set may include three OFDM symbols, OFDM symbol#0 toOFDM symbol#2, in time domain. The UE 102 may monitor PDCCH in one ormore control resource sets. The PRB set may be configured with respectto each control resource set through dedicated RRC signaling (e.g., viadedicated RRC reconfiguration). The control resource set duration mayalso be configured with respect to each control resource set throughdedicated RRC signaling.

In the control resource unit and reference signal structure shown inFIG. 14, control resource units are defined as a set of resourceelements (REs). Each control resource unit includes all REs (i.e., 12REs) within a single OFDM symbol and within a single PRB (i.e.,consecutive 12 subcarriers). REs on which reference signals (RSs) aremapped may be counted as those REs, but the REs for RSs are notavailable for PDCCH transmission and the PDCCH are not mapped on the REsfor RSs.

Multiple control resource units may be used for a transmission of asingle PDCCH. In other words, one PDCCH may be mapped the REs which areincluded in multiple control resource units. FIG. 14 shows the examplethat the UE 102 performing blind decoding of PDCCH candidates assumingthat multiple control resource units located in the same frequencycarries one PDCCH. However, RSs for the PDCCH demodulation may becontained in all of the resource units on which the PDCCH is mapped. TheUE 102 may not be allowed to assume that the RSs contained in a givenresource unit can be used for demodulation of a different resource unit.This may increase diversity gain for PDCCH transmission, since the gNB160 may apply different precoders for different resource units.Alternatively, the UE 102 may be allowed to assume that the RSscontained in a given resource unit can be used for demodulation of adifferent resource unit within the same PRB. This may improve channelestimation accuracy, since the gNB 160 may apply the same precoders formore RSs within a PRB.

FIG. 15 illustrates an example of control channel and shared channelmultiplexing. The starting and/or ending position(s) of PDSCH may beindicated via the scheduling PDCCH. More specifically, the DCI formatwhich schedule PDSCH may include information field(s) for indicating thestarting and/or ending position(s) of the scheduled PDSCH.

The UE 102 may include a higher layer processor which is configured toacquire a dedicated RRC message. The dedicated RRC message may includeinformation indicating a control resource set configuration. The UE 102may also include PDCCH receiving circuitry which is configured tomonitor a PDCCH based on the control resource set configuration. ThePDCCH may carry DCI format which schedule a PDSCH. The UE 102 may alsoinclude PDSCH receiving circuitry which is configured to receive thePDSCH upon the detection of the corresponding PDCCH.

The gNB 160 may include a higher layer processor which is configured tosend a dedicated RRC message. The dedicated RRC message may includeinformation indicating a control resource set configuration. The gNB 160may also include PDCCH transmitting circuitry which is configured totransmit a PDCCH based on the control resource set configuration. ThePDCCH may carry DCI format which schedule a PDSCH. The gNB 160 may alsoinclude PDSCH transmitting circuitry which is configured to transmit thePDSCH upon the transmission of the corresponding PDCCH.

UE 102 may monitor PDCCH candidates in a control resource set. The setof PDCCH candidates may be also referred to as search space. The controlresource set may be defined by a PRB set in frequency domain and aduration in units of OFDM symbol in time domain.

For each serving cell, higher layer signaling such as common RRCmessages or UE dedicated RRC messages may configure the UE 102 with oneor more PRB set(s) for PDCCH monitoring. For each serving cell, higherlayer signaling such as common RRC messages or UE dedicated RRC messagesmay also configure the UE 102 with the control resource set duration forPDCCH monitoring.

Each control resource set may include a set of control channel elements(CCEs). Each CCE may be mapped to a set of resource element groups(REGs) which includes a plurality of REs. In the control resource set, agroup-common PDCCH may be transmitted by the gNB 160. If the UE 102 isconfigured to monitor the group-common PDCCH by higher layer signaling,the UE 102 may monitor the group-common PDCCH. The group-common PDCCHmay be a PDCCH with CRC scrambled by the certain RNTI, which may befixed or be configured independently from C-RNTI. Alternatively, thegroup-common PDCCH may be a PDCCH with DCI format of which the RNTIfield value is set to the certain RNTI.

In the control resource set, a UE-specific PDCCH may be transmitted bythe gNB 160. The UE 102 may monitor the PDCCH. The UE-specific PDCCH maybe a PDCCH with CRC scrambled by the C-RNTI of the UE 102.Alternatively, the UE-specific PDCCH may be a PDCCH with DCI format ofwhich the RNTI field value is set to the C-RNTI of the UE 102.Monitoring of PDCCH may mean attempting to decode each of the PDCCHcandidates in the set according to the monitored DCI formats. The UE 102may monitor common search space within the control resource set. The UE102 may also monitor UE-specific search space within the controlresource set. The UE-specific PDCCH may be monitored in both the commonand UE-specific search spaces while the group-common PDCCH may bemonitored in only the common search space. The UE-specific PDCCH mayschedules a PDSCH. The UE 102 may not be required to monitor thegroup-common PDCCH in the slot where the UE 102 would have a scheduleduplink transmission using at least the first OFDM symbol of the slot.

Upon detection of the UE-specific PDCCH, the UE 102 may receive thecorresponding PDSCH. The DCI format of the UE-specific PDCCH may includeone or more information field(s), for example, a field for indicatingresource block assignment for the PDSCH, a field for indicating thestarting position (the index of first OFDM symbol which carries thePDSCH) of the PDSCH, a field for indicating modulation order andtransport block size for the PDSCH, etc. The group-common PDCCH, theUE-specific PDCCH and the PDSCH may be mapped to different RE sets sothat they do not collide with one another.

For each serving cell, higher layer signalling configures a UE with Pcontrol resource sets. For control resource set p, 0<=p<P, theconfiguration includes: a first symbol index provided by higher layerparameter CORESET-start-symb; the number of consecutive symbols providedby higher layer parameter CORESET-time-duration; a set of resourceblocks provided by higher layer parameter CORESET-freq-dom; a CCE-to-REGmapping provided by higher layer parameter CORESET-trans-type (alsoreferred to as CORESET-CCE-to-REG-mapping); a REG bundle size, in caseof interleaved CCE-to-REG mapping, provided by higher layer parameterCORESET-REG-bundle-size; and antenna port quasi-collocation provided byhigher layer parameter CORESET-TCI-StateRefId. If the UE is notconfigured with higher layer parameter CORESET-TCI-StateRefId, the UEmay assume that the DMRS antenna port associated with PDCCH reception inthe USS and the DMRS antenna port associated with PBCH reception arequasi-collocated with respect to delay spread, Doppler spread, Dopplershift, average delay, and spatial Rx parameters.

For each serving cell and for each DCI format with CRC scrambled byC-RNTI, SPS-RNTI and/or grant-free RNTI that a UE is configured tomonitor PDCCH, the UE is configured with associations to controlresource sets. The associations may include associations to a set ofcontrol resource sets by higher layer parameter DCI-to-CORESET-map. Foreach control resource set in the set of control resource sets, theassociations may include: the number of PDCCH candidates per CCEaggregation level L by higher layer parameter CORESET-candidates-DCI; aPDCCH monitoring periodicity of k_(p) slots by higher layer parameterCORESET-monitor-period-DCI; a PDCCH monitoring offset of o_(p) slots,where 0<=o_(p)<k_(p), by higher layer parameterCORESET-monitor-offset-DCI; and a PDCCH monitoring pattern within aslot, indicating first symbol(s) of the control resource set within aslot for PDCCH monitoring, by higher layer parameterCORESET-monitor-DCI-symbolPattern. The UE 102 may assume that non-slotbased scheduling is configured in addition to slot-based scheduling, ifthe UE 102 is configured with higher layer parameterCORESET-monitor-DCI-symbolPattern. The UE 102 may assume that non-slotbased scheduling is not configured but slot-based scheduling only, ifthe UE 102 is not configured with higher layer parameterCORESET-monitor-DCI-symbolPattern.

FIG. 16 illustrates PDCCH monitoring occasions for slot-basedscheduling. A search space set may be identified for a combination of acontrol resource set, a DCI format (or DCI format group consisting ofDCI format having a same DCI payload size). In the example shown in FIG.16, two search space sets are seen, search space set #0 and #1. Bothsearch space set #0 and #1 are associated with a same CORESET. Theconfiguration of the CORESET such as CORESET-start-symb,CORESET-time-duration, CORESET-freq-dom, CORESET-trans-type,CORESET-REG-bundle-size, CORESET-TCI-StateRefId apply to both searchspace set #0 and #1. For example, CORESET-time-duration set to 3 symbolsapplies to both of them. Search space set #0 may be associated with acertain DCI format (e.g. DCI format 1, fallback DCI format), and searchspace set #1 may be associated with another certain DCI format (e.g. DCIformat 2, regular DCI format). The higher layer parameterCORESET-monitor-period-DCI is set to 2 slots for search space set #0,while the higher layer parameter CORESET-monitor-period-DCI is set to 1slot for search space set #1. Therefore, DCI format 1 may be potentiallytransmitted and/or monitored in every 2 slot, while DCI format 2 may bepotentially transmitted and/or monitored in every slot.

FIG. 17 illustrates PDCCH monitoring occasions for non-slot-basedscheduling. In the example shown in FIG. 16, two search space sets areseen, search space set #2 and #3. Both search space set #2 and #3 areassociated with a same CORESET. This CORESET may or may not be the sameCORESET as in FIG. 16. The higher layer parametersCORESET-monitor-period-DCI for both search space set #2 and #3 are setto 1 slot.

In addition, the higher layer parametersCORESET-monitor-DCI-symbolPattern are individually configured to searchspace set #2 and #3. The higher layer parameterCORESET-monitor-DCI-symbolPattern may indicate, using a bitmap scheme,OFDM symbol(s) on which PDCCH is monitored. To be more specific, Thehigher layer parameter CORESET-monitor-DCI-symbolPattern per searchspace set may consist of 14 bits, the 1^(st) bit to 14^(th) bit whichcorrespond to OFDM symbol #0 to #13, respectively. Each of the bitsindicates whether or not PDCCH is monitored on the corresponding OFDMsymbol (e.g. “O” indicates no PDCCH monitoring and “1” indicates PDCCHmonitoring, or vice versa). In this example, the higher layer parametersCORESET-monitor-DCI-symbolPattern for search space set #2 indicates OFDMsymbols #0 and #7 for PDCCH monitoring, which the higher layerparameters CORESET-monitor-DCI-symbolPattern for search space set #3indicates OFDM symbols #0, #2, #4, #6, #8, #10, #12 for PDCCHmonitoring. It is noted that these PDCCH monitoring applies to the slotthat is specified by CORESET-monitor-period-DCI andCORESET-monitor-offset-DCI.

A control-channel element may consist of 6 resource-element groups(REGs) where a resource-element group equals one resource block duringone OFDM symbol. Resource-element groups within a control-resource setmay be numbered in increasing order in a time-first manner, startingwith 0 for the first OFDM symbol and the lowest-numbered resource blockin the control resource set. A UE can be configured with multiplecontrol-resource sets. Each control-resource set may be associated withone CCE-to-REG mapping only. The CCE-to-REG mapping for acontrol-resource set can be interleaved or non-interleaved, configuredby the higher-layer parameter CORESET-CCE-REG-mapping-type. The REGbundle size is configured by the higher-layer parameterCORESET-REG-bundle-size. For non-interleaved CCE-to-REG mapping, the REGbundle size is 6. For interleaved CCE-to-REG mapping, the REG bundlesize is either 2 or 6 for a CORESET with CORESET-time-duration set to 1,and the REG bundle size is either N^(CORESET) _(symb) or 6 for a CORESETwith CORESET-time-duration N^(CORESET) _(symb) set to greater than 1.The UE may assume: the same precoding in the frequency domain being usedwithin a REG bundle if the higher-layer parameterCORESET-precoder-granularity equals CORESET-REG-bundle-size; and thesame precoding in the frequency domain being used across withincontiguous RBs in CORESET if the higher-layer parameterCORESET-precoder-granularity equals the number of contiguous RBs in thefrequency domain within CORESET.

Some of the configuration per CORESET might not apply to search spaceset(s) for which the higher layer parameterCORESET-monitor-DCI-symbolPattern (e.g. symbol-wise bitmap) isconfigured. For example, even if the CORESET-time-duration is set togreater than 1 OFDM symbol, the UE 102 may assume each PDCCH monitoringoccasion spans 1 OFDM symbol for the search space set(s) which isconfigured with CORESET-monitor-DCI-symbolPattern. TheCORESET-time-duration set to greater than 1 OFDM symbol may beapplicable to all and only the search space set(s) which is notconfigured with CORESET-monitor-DCI-symbolPattern. In this case, forinterleaved CCE-to-REG mapping, the REG bundle size may be determineddepending the CORESET-time-duration. Alternatively, for interleavedCCE-to-REG mapping, the REG bundle size may be determined assumingN^(CORESET) _(symb)=1.

Alternatively, the CORESET duration is always configured independently,and PDCCH monitoring occasion configured by using the symbol-wise bitmapmay mean start of monitoring occasion if the CORESET duration is morethan 1 OFDM symbol. For example, the CORESET-time-duration is set to 2OFDM symbols and the third bit of the CORESET-monitor-DCI-symbolPatternis set to “1”, the UE 102 may have to monitor PDCCH candidates which aremapped on the third and fourth OFDM symbols. In other words, each bit ofthe CORESET-monitor-DCI-symbolPattern set to “1” may indicate thestarting symbol of one or more consecutive OFDM symbol(s) on which PDCCHcandidate(s) are mapped.

With this alternative, if the CORESET duration is more than 1 OFDMsymbol and at least if any of two adjacent bits of theCORESET-monitor-DCI-symbolPattern are set to “1”, PDCCH monitoringoccasions starting with OFDM symbols indicated by those two bitspartially overlap. There are several ways to handle this overlapping.The first approach is that the UE 102 is not expected to be configuredwith the CORESET-monitor-DCI-symbolPattern which causes overlappingbetween adjacent PDCCH monitoring occasions for a same search space set.The second approach is that the PDCCH monitoring occasion overlapping isallowed and the UE 102 is not required to monitor PDCCH candidates beingfully/partially mapped to the RE or REG that was already used by anotherdetected PDCCH of another PDCCH monitoring occasion of the CORESET. Thethird approach is that the PDCCH monitoring occasion overlapping isallowed and the UE 102 is not required to monitor PDCCH candidates ifthe higher-layer parameter CORESET-precoder-granularity equals thenumber of contiguous RBs in the frequency domain within CORESET and ifanother PDCCH was detected in the other PDCCH monitoring occasion (i.e.overlapping PDCCH monitoring occasion) of the CORESET. Additionallyand/or alternatively, if the higher-layer parameterCORESET-precoder-granularity equals the number of contiguous RBs in thefrequency domain within CORESET and if a PDCCH was detected in a PDCCHmonitoring occasion in the CORESET, the UE 102 may assume DMRSassociated with the detected PDCCH is present in all REGs within the setof contiguous RBs of the CORESET where and when the detected PDCCH ismapped, and the UE 102 may not be expected to monitor PDCCH(s) inanother PDCCH monitoring occasion overlapping the DMRS.

Each control resource set includes a set of CCEs numbered from 0 toN_(CCE,p,kp)−1 where N_(CCE,p,kp) is the number of CCEs in controlresource set p in monitoring period k_(p). The sets of PDCCH candidatesthat a UE monitors are defined in terms of PDCCH UE-specific searchspaces. A PDCCH UE-specific search space S^((L)) _(kp) at CCEaggregation level L is defined by a set of PDCCH candidates for CCEaggregation level L. L can be one of 1, 2, 4, and 8.

For each serving cell, a UE 102 may have to set the slot configurationper slot over the number of slots to be equal to the slot configurationper slot over the number of slots as indicated by higher layer parameterSlot-assignmentSIB1 that may be a UE-common parameter (i.e.cell-specific parameter). If the UE is additionally provided UE-specifichigher layer parameter Slot-assignment for the slot format per slot overthe number of slots, the parameter Slot-assignment overrides onlyflexible symbols (also referred to as unknown symbols) per slot over thenumber of slots as provided by Slot-assignmentSIB1.

For each serving cell, for a set of symbols of a slot that are indicatedas flexible (also referred to as unknown) by higher layer parameterSlot-assignmentSIB1 and, when provided, by higher layer parameterSlot-assignment, the UE 102 may follow the following assumptions. The UE102 may have to receive PDCCH, PDSCH, or CSI-RS in the set of symbols ofthe slot if the UE 102 receives a corresponding indication by a DCIformat with CRC scrambled by C-RNTI or a configuration by higher layers.The UE 102 may have to transmit PUSCH, PUCCH, PRACH, or SRS in the setof symbols of the slot if the UE receives a corresponding indication bya DCI format with CRC scrambled by C-RNTI or a configuration by higherlayers. The UE 102 configured for reception of PDCCH or trigger type 0CSI-RS (i.e. higher layer configured CSI-RS, also known assemi-statically configured periodic CSI-RS) in the set of symbols of theslot may have to receive the PDCCH or the trigger type 0 CSI-RS if theUE does not detect a DCI format with CRC scrambled by C-RNTI indicatingto the UE 102 to transmit PUSCH, PUCCH, PRACH, or SRS in the set ofsymbols of the slot; otherwise, the UE 102 may not receive the PDCCH orthe trigger type 0 CSI-RS in the set of symbols of the slot and may haveto transmit PUSCH, PUCCH, PRACH, or SRS in the set of symbols of theslot. The UE 102 configured for transmission of trigger type 0 SRS (i.e.higher layer configured SRS, also known as semi-statically configuredperiodic SRS) or of PUCCH configured by higher layers in the set ofsymbols in the slot, may have to transmit trigger type 0 SRS or PUCCHconfigured by higher layers in the set of symbols of the slot if the UEdoes not detect a DCI format with CRC scrambled by C-RNTI that indicatesto the UE to transmit PDSCH or CSI-RS in the set of symbols in the slot;otherwise, the UE may not transmit the trigger type 0 SRS or PUCCH inthe set of symbols of the slot.

For a set of symbols of a slot that are indicated as uplink by higherlayer parameter Slot-assignmentSIB1 or, when provided, by higher layerparameter Slot-assignment, the UE 102 may not be expected to beindicated by a DCI format with CRC scrambled by C-RNTI or be configuredby higher layers to receive PDCCH, PDSCH, or CSI-RS in the set ofsymbols of the slot. For a set of symbols of a slot that are indicatedas downlink by higher layer parameter Slot-assignmentSIB1 or, whenprovided, by higher layer parameter Slot-assignment, the UE 102 may notbe expected to be indicated by a DCI format with CRC scrambled by C-RNTIor be configured by higher layers to transmit PUSCH, PUCCH, PRACH, orSRS in the set of symbols of the slot.

If a UE 102 is not configured by higher layers with parameterSFI-applicable-cells (i.e. if the UE 102 is configured with monitoringof DCI format STI of if the UE 102 is configured with any parameterrelated to monitoring of DCI format STI), the UE 102 may follow theabove described procedure to determine the slot format for each slot. Ifa UE 102 is configured by higher layers with parameterSFI-applicable-cells, and for serving cell that the UE 102 is notconfigured with parameter SFI-applicable-cells, the UE 102 may followthe above described procedure to determine the slot format for eachslot. If the UE 102 configured with monitoring a DCI format with CRCscrambled by SFI-RNTI for a serving cell and if the UE 102 does notdetect the DCI format with CRC scrambled by SFI-RNTI which wouldindicate slot format for a given slot, the UE 102 may also follow theabove described procedure to determine the slot format for that slot.Alternatively, if the UE 102 configured with monitoring a DCI formatwith CRC scrambled by SFI-RNTI for a serving cell and if the UE 102 doesnot detect the DCI format with CRC scrambled by SFI-RNTI which wouldindicate slot format for a given slot, the UE 102 may also follow theabove described procedure to determine the slot format for that slotexcept for PDCCH reception, trigger type 0 CSI-RS reception, SPS PDSCHreception, trigger type 0 SRS transmission, PUCCH transmission,SPS/grant-free PUSCH transmission, or any combination of them.

If a UE 102 is configured by higher layers with parameterSFI-applicable-cells, the UE 102 is configured with a SFI-RNTI providedby higher layer parameter SFI-RNTI and with a set of serving cells byhigher layer parameter SFI-monitoring-cells for monitoring PDCCHconveying a DCI format (e.g. a certain DCI format for SFI, also referredto as DCI format STI hereafter) with CRC scrambled by SFI-RNTI. Perserving cell in the set of serving cells, the UE is configuredparameters including: control resource sets by higher layer parameterSFI-to-CORESET-map for monitoring PDCCH conveying DCI format SFI; apayload size of DCI format SFI by higher layer parameterSFI-DCI-payload-length; a set of cells for which DCI format SFI isapplicable by higher layer parameter SFI-applicable-cells; a location ofa field in DCI format SFI for a corresponding cell for each cell fromthe set of cells by higher layer parameter SFI-cell-to-SFI; the numberof PDCCH candidates per CCE aggregation level for DCI format SFI byhigher layer parameter SFI-Num-PDCCH-cand; a monitoring periodicity forPDCCH with DCI format SFI by higher layer parameterSFI-monitoring-periodicity.

If a UE 102 detects a DCI format with CRC scrambled by SFI-RNTI in slotmT_(SFI) the slot configuration for slots {mT_(SFI), mT_(SFI)+1, . . .(m+1)T_(SFI)−1} is given by the slot configuration indicated by the DCIformat with CRC scrambled by SFI-RNTI, where T_(SFI) is the value of theparameter SFI-monitoring-periodicity configured to a UE 102 by higherlayers for a DCI format with CRC scrambled by SFI-RNTI.

For each serving cell that a UE 102 is configured by higher layers withthe parameter SFI-applicable-cells, the UE 102 may assume some or all ofthe following (1) to (4).

(1) For a set of symbols of a slot, the UE 102 may not be expected todetect a DCI format with CRC scrambled by SFI-RNTI and indicating theset of symbols of the slot as uplink and to detect a DCI format with CRCscrambled by C-RNTI and indicating to the UE 102 to receive PDSCH orCSI-RS in the set of symbols of the slot.

(2) For a set of symbols of a slot, the UE 102 is not expected to detecta DCI format with CRC scrambled by SFI-RNTI and indicating the set ofsymbols in the slot as downlink and to detect a DCI format with CRCscrambled by C-RNTI and indicating to the UE 102 to transmit PUSCH,PUCCH, PRACH, or SRS in the set of symbols of the slot.

(3) For a set of symbols of a slot that are indicated as downlink/uplinkby higher layer parameter Slot-assignmentSIB1 or, when provided, byhigher layer parameter Slot-assignment, the UE 102 may not be expectedto detect a DCI format with CRC scrambled by SFI-RNTI and indicating theset of symbols of the slot as uplink/downlink, respectively, or asflexible.

(4) For a set of symbols of a slot that are indicated as flexible byhigher layer parameter Slot-assignmentSIB1 and, when provided, by higherlayer parameter Slot-assignment, the UE 102 may follow all of or a partof the following procedures: if the UE 102 detects a DCI format with CRCscrambled by a SFI-RNTI and indicating the set of symbols of the slot asflexible and the UE 102 detects a DCI format with CRC scrambled byC-RNTI indicating to the UE to receive PDSCH or CSI-RS in the set ofsymbols of the slot, the UE 102 may follow the indication of the DCIformat with CRC scrambled by C-RNTI; if the UE 102 detects a DCI formatwith CRC scrambled by a SFI-RNTI and indicating the set of symbols ofthe slot as flexible and the UE 102 detects a DCI format with CRCscrambled by C-RNTI indicating to the UE 102 to transmit PUSCH, PUCCH,PRACH, or SRS in the set of symbols of the slot the UE 102 may followthe indication of the DCI format with CRC scrambled by C-RNTI; if the UE102 detects a DCI format with CRC scrambled by a SFI-RNTI and indicatingthe set of symbols of the slot as flexible and the set of symbols of theslot are also indicated as flexible by higher layer parameterSlot-assignmentSIB1 or, when provided, by higher layer parameterSlot-assignment, the UE 102 may consider the set of symbols as reserved;if the UE 102 is configured by higher layers reception of PDCCH ortrigger type 0 CSI-RS or SPS PDSCH in the set of symbols of the slot,the UE 102 may have to receive PDCCH or trigger type 0 CSI-RS or SPSPDSCH in the set of symbols of the slot only if the UE detects a DCIformat with CRC scrambled by SFI-RNTI that indicates the set of symbolsof the slot as downlink; if the UE 102 is configured by higher layerstransmission of trigger type 0 SRS or of PUCCH or of SPS/grant-freePUSCH in the set of symbols of the slot, the UE 102 may have to transmittrigger type 0 SRS or PUCCH or SPS/grant-free PUSCH in the set ofsymbols of the slot only if the UE 102 detects a DCI format with CRCscrambled by SFI-RNTI that indicates the set of symbols of the slot asuplink.

The fourth procedure of (4) can be replaced with that if the UE 102 isconfigured by higher layers reception of PDCCH, trigger type 0 CSI-RS,SPS PDSCH or some of them in the set of symbols of the slot, the UE 102may have to receive PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some ofthem in the set of symbols of the slot only either if the UE 102 detectsa DCI format with CRC scrambled by SFI-RNTI that indicates the set ofsymbols of the slot as downlink or if the UE 102 detects a DCI formatwith CRC scrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules a PDSCH tobe mapped on at least the set of symbols of the slot. With this option,even if the UE 102 detects a DCI format with CRC scrambled by SFI-RNTIthat indicates the set of symbols of the slot as flexible, the UE 102may have to receive PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some ofthem in the set of symbols of the slot if the UE detects a DCI formatwith CRC scrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules a PDSCH tobe mapped on the set of symbols of the slot. In other words, if the UE102 detects a DCI format with CRC scrambled by SFI-RNTI that indicatesthe set of symbols of the slot as flexible or uplink, the UE 102 may notassume PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some of them in theset of symbols of the slot unless the UE detects a DCI format with CRCscrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules a PDSCH to be mappedon the set of symbols of the slot. Moreover, if the UE 102 detects a DCIformat with CRC scrambled by SFI-RNTI that indicates a subset of the setof symbols of the slot as downlink and if the UE 102 detects a DCIformat with CRC scrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules aPDSCH to be mapped on at least the rest of the set, the UE 102 may haveto receive PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some of them inthe set of symbols.

Similarly, the fifth procedure of (4) can be replaced with that if theUE 102 is configured by higher layers transmission of trigger type 0SRS, PUCCH, SPS/grant-free PUSCH or some of them in the set of symbolsof the slot, the UE 102 may have to transmit trigger type 0 SRS, PUCCH,SPS/grant-free PUSCH or some of them in the set of symbols of the slotonly either if the UE detects a DCI format with CRC scrambled bySFI-RNTI that indicates the set of symbols of the slot as downlink or ifthe UE 102 detects a DCI format with CRC scrambled byC-RNTI/TC-RNTI/SPS-RNTI that schedules a PUSCH to be mapped on the setof symbols of the slot. With this option, even if the UE detects a DCIformat with CRC scrambled by SFI-RNTI that indicates the set of symbolsof the slot as flexible, the UE 102 may have to transmit trigger type 0SRS, PUCCH, SPS/grant-free PUSCH or some of them in the set of symbolsof the slot if the UE 102 detects a DCI format with CRC scrambled byC-RNTI/TC-RNTI/SPS-RNTI that schedules a PUSCH to be mapped on at leastthe set of symbols of the slot. In other words, if the UE 102 detects aDCI format with CRC scrambled by SFI-RNTI that indicates the set ofsymbols of the slot as flexible or downlink, the UE 102 may not assumetrigger type 0 SRS, PUCCH, SPS/grant-free PUSCH or some of them in theset of symbols of the slot unless the UE detects a DCI format with CRCscrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules a PUSCH to be mappedon the set of symbols of the slot. Moreover, if the UE 102 detects a DCIformat with CRC scrambled by SFI-RNTI that indicates a subset of the setof symbols of the slot as uplink and if the UE 102 detects a DCI formatwith CRC scrambled by C-RNTI/TC-RNTI/SPS-RNTI that schedules a PUSCH tobe mapped on at least the rest of the set, the UE 102 may have totransmit trigger type 0 SRS, PUCCH, SPS/grant-free PUSCH or some of themin the set of symbols.

The fourth procedure of (4) can be replaced with that if the UE 102 isconfigured by higher layers reception of PDCCH, trigger type 0 CSI-RS,SPS PDSCH or some of them in the set of symbols of the slot, the UE 102may have to receive PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some ofthem in the set of symbols of the slot only either if the UE detects aDCI format with CRC scrambled by SFI-RNTI that indicates the set ofsymbols of the slot as downlink or if the UE does not detect any DCIformat with CRC scrambled by SFI-RNTI indicating a slot format of theconcerned slot.

Similarly, the fifth procedure of (4) can be replaced with that if theUE 102 is configured by higher layers transmission of trigger type 0SRS, PUCCH, SPS/grant-free PUSCH or some of them in the set of symbolsof the slot, the UE 102 may have to transmit trigger type 0 SRS, PUCCH,SPS/grant-free PUSCH or some of them in the set of symbols of the slotonly either if the UE detects a DCI format with CRC scrambled bySFI-RNTI that indicates the set of symbols of the slot as downlink or ifthe UE does not detect any DCI format with CRC scrambled by SFI-RNTIindicating a slot format of the concerned slot.

The fourth procedure of (4) can be replaced with that if the UE 102 isconfigured by higher layers reception of PDCCH, trigger type 0 CSI-RS,SPS PDSCH or some of them in the set of symbols of the slot, the UE 102may have to receive PDCCH, trigger type 0 CSI-RS, SPS PDSCH or some ofthem in the set of symbols of the slot only either if the UE detects aDCI format with CRC scrambled by SFI-RNTI that indicates the set ofsymbols of the slot as downlink or if the UE does not detect any DCIformat with CRC scrambled by SFI-RNTI indicating a slot format of theconcerned slot or if the UE detects a DCI format with CRC scrambled byC-RNTI/TC-RNTI/SPS-RNTI that schedules a PDSCH to be mapped on the setof symbols of the slot.

Similarly, the fifth procedure of (4) can be replaced with that if theUE 102 is configured by higher layers transmission of trigger type 0SRS, PUCCH, SPS/grant-free PUSCH or some of them in the set of symbolsof the slot, the UE 102 may have to transmit trigger type 0 SRS, PUCCH,SPS/grant-free PUSCH or some of them in the set of symbols of the slotonly either if the UE detects a DCI format with CRC scrambled bySFI-RNTI that indicates the set of symbols of the slot as downlink or ifthe UE does not detect any DCI format with CRC scrambled by SFI-RNTIindicating a slot format of the concerned slot or if the UE 102 detectsa DCI format with CRC scrambled by C-RNTI/TC-RNTI/SPS-RNTI thatschedules a PUSCH to be mapped on the set of symbols of the slot.

A UE 102 is described. The UE 102 may comprise a higher layer processorconfigured to acquire a dedicated radio resource control (RRC)configuration including information for indicating whether or not slotformat indicator (SFI) is applicable to a serving cell. The UE 102 mayalso comprise physical downlink control channel (PDCCH) receivingcircuitry configured to monitor a first PDCCH scheduling a firstphysical downlink shared channel (PDSCH) in the serving cell, in a casethat the dedicated RRC configuration including the informationindicating that SFI is applicable to the serving cell is acquired, tomonitor a second PDCCH carrying the SFI. The UE 102 may further comprisePDSCH receiving circuitry configured to receive the first PDSCH, upon adetection of the first PDCCH. If monitoring of the first PDCCH in a setof symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may be monitored in the set of symbols if another firstPDCCH scheduling a second PDSCH which is mapped to at least all the restof the set of symbols is detected. If monitoring of the first PDCCH in aset of symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may not be monitored in the set of symbols if any otherfirst PDCCH scheduling a second PDSCH which is mapped to at least allthe rest of the set of symbols is not detected.

A gNB 160 is described. The gNB 160 may comprise a higher layerprocessor configured to send a dedicated radio resource control (RRC)configuration including information for indicating whether or not slotformat indicator (SFI) is applicable to a serving cell. The gNB 160 mayalso comprise physical downlink control channel (PDCCH) transmittingcircuitry configured to transmit a first PDCCH scheduling a firstphysical downlink shared channel (PDSCH) in the serving cell and, in acase that the dedicated RRC including the information indicating thatSFI is applicable to the serving cell is sent, to transmit a secondPDCCH carrying the SFI. The UE 102 may further comprise PDSCHtransmitting circuitry configured to transmit the first PDSCH, upon atransmission of the first PDCCH. If monitoring of the first PDCCH in aset of symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may be monitored in the set of symbols if another firstPDCCH scheduling a second PDSCH which is mapped to at least all the restof the set of symbols is detected. If monitoring of the first PDCCH in aset of symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may not be monitored in the set of symbols if any otherfirst PDCCH scheduling a second PDSCH which is mapped to at least allthe rest of the set of symbols is not detected.

FIG. 18 illustrates an example of slot formats for a given slot. Slotformat #0 may specify that all symbols in the slot are DL symbols. Slotformats #1 to #13 may specify that the slot is filled from the earliestsymbol by up to 13 DL symbol(s) followed by flexible symbol(s). Slotformat #14 may specify that all symbols in the slot are flexiblesymbols. Slot formats #15 to #104 may specify that the slot is filledfrom the earliest symbol up to 12 DL symbol(s) followed by flexiblesymbol(s) further followed by UL symbol(s). Slot formats #105 to #106may specify that the slot is filled from the earliest symbol up to 2flexible symbol(s) followed by UL symbol(s). Slot format #107 mayspecify that all symbols in the slot are UL symbols. The UE-specificparameter Slot-assignment may be able to be set with any of theseindices. On the other hand, the UE-common parameter Slot-assignmentSIB1and SFI field indicated by the DCI format with CRC scrambled by SFI-RNTImay not be able to be set with every index. The UE-common parameterSlot-assignmentSIB1 may be set with one of a predefined subset (e.g. thesubset including 8 slot format indices) of these indices. The SFI fieldindicated by the DCI format with CRC scrambled by SFI-RNTI may be setwith one of a higher-layer configured subset (e.g. the subset including8 slot format indices) of these indices.

Timing between DL assignment and corresponding DL data transmission maybe indicated by a field in the DCI from a set of values, timing betweenUL assignment and corresponding UL data transmission may be indicated bya field in the DCI from a set of values, and timing between DL datareception and corresponding acknowledgement may be indicated by a fieldin the DCI from a set of values. The sets of values may be configured byhigher layer signaling. Default timing(s) may be pre-defined at leastfor the case where the timing(s) is (are) unknown to the UE 102.

FIG. 19 illustrates an example of a downlink scheduling and HARQtimeline. A PDCCH transmitted by the gNB 160 in slot n may carry DCIformat which schedules a PDSCH, the DCI format including at least twofields, the first field may indicate k₁ and the second field mayindicate k₂.

The UE 102 detecting the PDCCH in slot n may receive the scheduled PDSCHin slot n+k₁, and then in slot n+k₁+k₂ the UE 102 may report HARQ-ACKcorresponding to the PDSCH. Alternatively, the second field may indicatem, and the UE 102 may report the HARQ-ACK in slot n+m. In other words,upon the detection of the corresponding PDCCH in slot i−k₁, the UE 102may receive a PDSCH in slot i, and the UE 102 may transmit the HARQ-ACKin slot j for the PDSCH transmission in slot j−k₂. Alternatively, the UE102 may transmit the HARQ-ACK in slot j for the PDSCH transmissionscheduled by the corresponding PDCCH in slot j−m.

FIG. 20 illustrates an example of an uplink scheduling timeline. A PDCCHtransmitted by the gNB 160 in slot n may carry DCI format whichschedules a PUSCH, the DCI format including at least a field which mayindicate k₃. The UE 102 detecting the PDCCH in slot n may transmit thescheduled PUSCH in slot n+k₃. In other words, upon the detection of thecorresponding PDCCH in slot i−k₃, the UE 102 may transmit a PUSCH inslot i,

FIG. 21 illustrates an example of a downlink aperiodic CSI-RStransmission timeline. A PDCCH transmitted by the gNB 160 in slot n maycarry DCI format which indicates presence of aperiodic CSI-RS, the DCIformat including at least a field which may indicate k₄. The UE 102detecting the PDCCH in slot n may assume presence of aperiodic CSI-RS inslot n+k₄ for CSI measurement and/or Radio Resource Management (RRM)measurement.

FIG. 22 illustrates an example of an uplink aperiodic SRS transmissiontimeline. A PDCCH transmitted by the gNB 160 in slot n may carry DCIformat which schedules an aperiodic SRS, the DCI format including atleast a field which may indicate k₅. The UE 102 detecting the PDCCH inslot n may transmit the scheduled aperiodic SRS in slot n+k₅. In otherwords, upon the detection of the corresponding PDCCH in slot i−k₅, theUE 102 may transmit aperiodic SRS in slot i,

The presence/disabling of each of above-described fields may beconfigured by higher layer signaling. The configurations ofpresence/disabling may be common among those fields. Alternatively, thepresence/disabling may be separately configurable. If at least one ofthe fields is not present or is disabled, a default value (e.g., apredefined fixed value or a value included in system information) may beused, instead. For example, a default value for k₁ may be 0, and adefault value for k₂ or k₃ may be 4.

If the field is present, the UE 102 may be configured with multiplevalues (e.g., the first value to the fourth value) by higher layersignaling. Each of the possible values for the field (e.g., 2-bit field)may correspond to a different value among the configured values. The UE102 may use, as a k value, the value which corresponds to the fieldvalue set in the associated field in the detected PDCCH.

The UE 102 may be configured with multiple values (e.g., the first valueto the third value) by higher layer signaling. At least one possiblevalue for the field (e.g., 2-bit field) may correspond to a predefinedfixed value. Each of the rest of possible values for the field (e.g.,2-bit field) may correspond to a different value among the configuredvalues.

The UE 102 may use, as a k value, the value which corresponds to thefield value set in the associated field in the detected PDCCH. In thiscase, without configurability of the presence of the field, the gNB 160can use the predefined fixed value so that the gNB 160 and the UE 102share the same k value even during RRC (re)configuration for thosehigher-layer configured values. The predefined fixed value may depend ontiming offset type. For example, the value for k₁ may be 0, and thevalue for k₂ or k₃ may be 4. Alternatively, a value indicated thoughsystem information can be used, instead of the predefined fixed value.

PDSCH and/or PUSCH RE mapping may be affected by higher layer signalingand/or layer-1 signaling such as a PDCCH with a DCI format 1 and 2. ForPDSCH, modulated complex-valued symbols may be mapped in REs which meetall of the following criteria: they are in the resource blocks assignedfor transmission; they are declared as available for PDSCH according torate matching resource set configuration and/or indication; they are notused for CSI-RS; they are not used for Phase Tracking RS (PT-RS); theyare not reserved for SS/PBCH; they are not declared as ‘reserved’.

To decode PDSCH according to a detected PDCCH, a UE may be configuredwith any of higher layer parameters: rate-match-PDSCH-resource-setconsisting of one or multiple reserved pairs of RBs (higher layerparameter rate-match-PDSCH-resource-RBs which is also referred to asbitmap-1) and reserved symbols (higher layer parametersrate-match-PDSCH-resource-symbols which is also referred to as bitmap-2)for which the reserved RBs apply; rate-match-resources-v-shiftconsisting of LTE-CRS-vshift(s); rate-match-resources-antenna-portconsisting of LTE-CRS antenna ports 1, 2 or 4 ports; rate-match-CORESETconsisting of CORESET-ID(s) of CORESET configured to a UE 102 formonitoring. The UE 102 may have to determine the PDSCH RE mappingaccording to the union of provided rate-matching configurations. Todecode PDSCH a UE 102 rate-matches around the REs corresponding todetected PDCCH that scheduled the PDSCH. A UE 102 may not be expected tohandle the case where PDSCH DMRS REs are over-lapping, even partially,with any RE(s) indicated by the rate-matching configurationrate-match-PDSCH-resource-set and rate-match-resources-v-shift andrate-match-resources-antenna-port and rate-match-CORESET.

More specifically, on the RB-symbol level, a UE 102 may be RRCconfigured with one or multiple pairs (e.g. up to 16 pairs) of bitmap-1and bitmap-2, each pair determining a time-frequency resource set, i.e.kronecker(transpose(bitmap-1), bitmap-2). The bitmap-1 is of at least RBgranularity (up to 275 bits, one bit corresponding to one RB). Thebitmap-2 is of 14 symbols (e.g. always 14 bits for 1 slot) in time forwhich the bitmap-1 applies (one bit per symbol). In addition, on theRB-symbol level, for a rate-matching resource set(s), a UE 102 may beRRC configured with one bitmap-3 per each pair of bitmap-1 and bitmap-2.Each bit in bitmap-3 corresponds to a unit equal to a duration of thebitmap-2, and indicates whether the pair is present in the unit or not.The bitmap-3 may be composed of {1, 5, 10, 20 or 40 units} but is atmost of 20 or 40 ms duration. If the bitmap-3 is configured, the UE 102rate-matches around union of the resource sets where each resource isexpressed by a set of bitmap-1, bitmap-2 and bitmap-3.

A layer-1 signaling may indicate resource sets for PDSCH rate matching.A DCI format scheduling PDSCH may include, if configured, an informationfield for indicating PDSCH rate matching resources which are linked tothe configured resource sets. There are several options. The firstoption is that 1 bit turns a single resource set on or off. In thisoption, the information field carries N bit(s), and each bit correspondsto different resource set (i.e. different combination of bitmap-1 andbitmap-2). The second option is that 1 bit turns all resource sets on oroff. In this option, the information field carries 1 bit. The thirdoption is that N bit turns subsets of the resource sets on or off. Inthis option, the information field carries N bit(s), and each bitcorresponds to different subset of the resource set (i.e. differentsubset out of all combinations of bitmap-1 and bitmap-2) For example,with this option, each entry of the 2^(N) entries expressed by theinformation field specifies on/off states of all configured resourcesets. The presence of this bit field in DCI format is configured byhigher layer signaling. Here, “on” may mean that a resource set isunavailable for PDSCH transmission and the PDSCH is rate matched aroundthe resource set. Meanwhile, “off” may mean that a resource set isavailable for PDSCH transmission and the PDSCH is not rate matchedaround but mapped on the resource set. Or, vice versa.

FIG. 23 illustrates a flow chart of a method for a UE. A method for a UE102 is described. The method may comprise acquiring 2311 a dedicatedradio resource control (RRC) configuration including information forindicating whether or not slot format indicator (SFI) is applicable to aserving cell. The method may also comprise, in a case that the dedicatedRRC configuration including the information indicating that SFI isapplicable to the serving cell is acquired, monitoring 2312 a secondPDCCH carrying the SFI. The method may also comprise monitoring 2313 afirst PDCCH scheduling a first physical downlink shared channel (PDSCH)in the serving cell. The method may further comprise receiving 2314 thefirst PDSCH, upon a detection of the first PDCCH. If monitoring of thefirst PDCCH in a set of symbols is configured and if the second PDCCH ofwhich the SFI indicates a subset of the set of symbols as downlink isdetected, the first PDCCH may be monitored in the set of symbols ifanother first PDCCH scheduling a second PDSCH which is mapped to atleast all the rest of the set of symbols is detected. If monitoring ofthe first PDCCH in a set of symbols is configured and if the secondPDCCH of which the SFI indicates a subset of the set of symbols asdownlink is detected, the first PDCCH may not be monitored in the set ofsymbols if any other first PDCCH scheduling a second PDSCH which ismapped to at least all the rest of the set of symbols is not detected.

FIG. 24 illustrates a flow chart of a method for a gNB. A method for agNB 160 is described. The method may comprise sending 2420 a dedicatedradio resource control (RRC) configuration including information forindicating whether or not slot format indicator (SFI) is applicable to aserving cell. The method may also comprise in a case that the dedicatedRRC including the information indicating that SFI is applicable to theserving cell is sent, transmitting 2421 a second PDCCH carrying the SFI.The method may also comprise transmitting 2422 a first PDCCH schedulinga first physical downlink shared channel (PDSCH) in the serving cell.The method may further comprise transmitting 2423 the first PDSCH, upona transmission of the first PDCCH. If monitoring of the first PDCCH in aset of symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may be monitored in the set of symbols if another firstPDCCH scheduling a second PDSCH which is mapped to at least all the restof the set of symbols is detected. If monitoring of the first PDCCH in aset of symbols is configured and if the second PDCCH of which the SFIindicates a subset of the set of symbols as downlink is detected, thefirst PDCCH may not be monitored in the set of symbols if any otherfirst PDCCH scheduling a second PDSCH which is mapped to at least allthe rest of the set of symbols is not detected.

FIG. 25 illustrates a flow chart of a method for a UE. The method maycomprise acquiring 2530 a first radio resource control (RRC)configuration including first information for indicating a controlresource set (CORESET) duration. The method may also comprise acquiring2531 second RRC configuration including second information forindicating physical downlink control channel (PDCCH) monitoring symbols.The method may also comprise 2532 monitoring a PDCCH, based on the firstinformation and the second information. The CORESET duration may be setto a value larger than 1. The second information may be bitmapinformation. Each bit of the bitmap information may correspond to arespective OFDM symbol in a slot. The bit of which value is set to 1 mayindicate a start of a PDCCH monitoring occasion. The bitmap informationmay be set such that any two adjacent PDCCH monitoring occasions do notoverlap with each other.

FIG. 26 illustrates a flow chart of a method for a base station. Themethod may comprise sending 2640 a first radio resource control (RRC)configuration including first information for indicating a controlresource set (CORESET) duration. The method may also comprise sending2641 a second RRC configuration including second information forindicating physical downlink control channel (PDCCH) monitoring symbols.The method may also comprise transmitting 2642 a PDCCH, based on thefirst information and the second information. The CORESET duration maybe set to a value larger than 1. The second information may be bitmapinformation. Each bit of the bitmap information may correspond to arespective OFDM symbol in a slot. The bit of which value is set to 1 mayindicate a start of a PDCCH monitoring occasion. The bitmap informationmay be set such that any two adjacent PDCCH monitoring occasions do notoverlap with each other.

It should be noted that various modifications are possible within thescope of the present invention defined by claims, and embodiments thatare made by suitably combining technical means disclosed according tothe different embodiments are also included in the technical scope ofthe present invention.

It should be noted that in most cases the UE 102 and the gNB. 160 mayhave to assume same procedures. For example, when the UE 102 follows agiven procedure (e.g. the procedure described above), the gNB 160 mayalso have to assume that the UE 102 follows the procedure. Additionally,the gNB 160 may also have to perform the corresponding procedures.Similarly, when the gNB 160 follows a given procedure, the UE 102 mayalso have to assume that the gNB 160 follows the procedure.Additionally, the UE 102 may also have to perform the correspondingprocedures. The physical signals and/or channels that the UE 102receives may be transmitted by the gNB 160. The physical signals and/orchannels that the UE 102 transmits may be received by the gNB 160. Thehigher-layer signals and/or channels (e.g. dedicated RRC configurationmessages) that the UE 102 acquires may be sent by the gNB 160. Thehigher-layer signals and/or channels (e.g. dedicated RRC configurationmessages) that the UE 102 sends may be acquired by the gNB 160.

It should be noted that names of physical channels and/or signalsdescribed herein are examples.

The term “computer-readable medium” refers to any available medium thatcan be accessed by a computer or a processor. The term“computer-readable medium,” as used herein, may denote a computer-and/or processor-readable medium that is non-transitory and tangible. Byway of example, and not limitation, a computer-readable orprocessor-readable medium may comprise RAM, ROM, EEPROM, CD-ROM or otheroptical disk storage, magnetic disk storage or other magnetic storagedevices, or any other medium that can be used to carry or store desiredprogram code in the form of instructions or data structures and that canbe accessed by a computer or processor. Disk and disc, as used herein,includes compact disc (CD), laser disc, optical disc, digital versatiledisc (DVD), floppy disk and Blu-ray® disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.

It should be noted that one or more of the methods described herein maybe implemented in and/or performed using hardware. For example, one ormore of the methods described herein may be implemented in and/orrealized using a chipset, an application-specific integrated circuit(ASIC), a large-scale integrated circuit (LSI) or integrated circuit,etc.

Each of the methods disclosed herein comprises one or more steps oractions for achieving the described method. The method steps and/oractions may be interchanged with one another and/or combined into asingle step without departing from the scope of the claims. In otherwords, unless a specific order of steps or actions is required forproper operation of the method that is being described, the order and/oruse of specific steps and/or actions may be modified without departingfrom the scope of the claims.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the systems, methods, and apparatus described herein withoutdeparting from the scope of the claims.

A program running on the gNB 160 or the UE 102 according to thedescribed systems and methods is a program (a program for causing acomputer to operate) that controls a CPU and the like in such a manneras to realize the function according to the described systems andmethods. Then, the information that is handled in these apparatuses istemporarily stored in a RAM while being processed. Thereafter, theinformation is stored in various ROMs or HDDs, and whenever necessary,is read by the CPU to be modified or written. As a recording medium onwhich the program is stored, among a semiconductor (for example, a ROM,a nonvolatile memory card, and the like), an optical storage medium (forexample, a DVD, a MO, a MD, a CD, a BD, and the like), a magneticstorage medium (for example, a magnetic tape, a flexible disk, and thelike), and the like, any one may be possible. Furthermore, in somecases, the function according to the described systems and methodsdescribed above is realized by running the loaded program, and inaddition, the function according to the described systems and methods isrealized in conjunction with an operating system or other applicationprograms, based on an instruction from the program.

Furthermore, in a case where the programs are available on the market,the program stored on a portable recording medium can be distributed orthe program can be transmitted to a server computer that connectsthrough a network such as the Internet. In this case, a storage devicein the server computer also is included. Furthermore, some or all of thegNB 160 and the UE 102 according to the systems and methods describedabove may be realized as an LSI that is a typical integrated circuit.Each functional block of the gNB 160 and the UE 102 may be individuallybuilt into a chip, and some or all functional blocks may be integratedinto a chip. Furthermore, a technique of the integrated circuit is notlimited to the LSI, and an integrated circuit for the functional blockmay be realized with a dedicated circuit or a general-purpose processor.Furthermore, if with advances in a semiconductor technology, atechnology of an integrated circuit that substitutes for the LSIappears, it is also possible to use an integrated circuit to which thetechnology applies.

Moreover, each functional block or various features of the base stationdevice and the terminal device used in each of the aforementionedembodiments may be implemented or executed by a circuitry, which istypically an integrated circuit or a plurality of integrated circuits.The circuitry designed to execute the functions described in the presentspecification may comprise a general-purpose processor, a digital signalprocessor (DSP), an application specific or general applicationintegrated circuit (ASIC), a field programmable gate array (FPGA), orother programmable logic devices, discrete gates or transistor logic, ora discrete hardware component, or a combination thereof. Thegeneral-purpose processor may be a microprocessor, or alternatively, theprocessor may be a conventional processor, a controller, amicrocontroller or a state machine. The general-purpose processor oreach circuit described above may be configured by a digital circuit ormay be configured by an analogue circuit. Further, when a technology ofmaking into an integrated circuit superseding integrated circuits at thepresent time appears due to advancement of a semiconductor technology,the integrated circuit by this technology is also able to be used.

The invention claimed is:
 1. A user equipment (UE) comprising: a higherlayer processor configured to acquire a first radio resource control(RRC) configuration including first information for indicating a controlresource set (CORESET) duration, and to acquire a second RRCconfiguration including second information for indicating physicaldownlink control channel (PDCCH) monitoring symbols, to acquire thirdinformation for indicating PDCCH monitoring periodicity k, and toacquire fourth information for indicating PDCCH monitoring offset o; andreceiving circuitry configured to monitor a PDCCH, based on the firstinformation, the second information, the third information, and thefourth information; wherein 0≤o<k, the CORESET duration is set to avalue larger than 1, the second information expresses a PDCCH monitoringpattern within a slot and is bitmap information that includes 14 bits,each bit of the bitmap information corresponds to a respective OFDMsymbol #0 to #13 in the slot, the bit of which value is set to 1indicates a start of a PDCCH monitoring occasion, the bitmap informationis set such that two adjacent PDCCH monitoring occasions in the slot donot overlap with each other, and the two adjacent PDCCH monitoringoccasions in the slot are based on a single CORESET duration parameterand a single resource block frequency-domain parameter.
 2. A basestation comprising: a higher layer processor configured to send a firstradio resource control (RRC) configuration including first informationfor indicating a control resource set (CORESET) duration, and to send asecond RRC configuration including second information for indicatingphysical downlink control channel (PDCCH) monitoring symbols, to sendthird information for indicating PDCCH monitoring periodicity k, and tosend fourth information for indicating PDCCH monitoring offset o; andtransmitting circuitry configured to transmit a PDCCH, based on thefirst information, the second information, the third information, andthe fourth information; wherein 0≤o<k, the CORESET duration is set to avalue larger than 1, the second information expresses a PDCCH monitoringpattern within a slot and is bitmap information that includes 14 bits,each bit of the bitmap information corresponds to a respective OFDMsymbol #0 to #13 in the slot, the bit of which value is set to 1indicates a start of a PDCCH monitoring occasion, the bitmap informationis set such that two adjacent PDCCH monitoring occasions in the slot donot overlap with each other, and the two adjacent PDCCH monitoringoccasions in the slot are based on a single CORESET duration parameterand a single resource block frequency-domain parameter.
 3. A method fora user equipment (UE), the method comprising: acquiring a first radioresource control (RRC) configuration including first information forindicating a control resource set (CORESET) duration; acquiring a secondRRC configuration including second information for indicating physicaldownlink control channel (PDCCH) monitoring symbols; acquiring thirdinformation for indicating PDCCH monitoring periodicity k; acquiringfourth information for indicating PDCCH monitoring offset o; andmonitoring a PDCCH, based on the first information, the secondinformation, the third information, and the fourth information; wherein0≤o<k, the CORESET duration is set to a value larger than 1, the secondinformation expresses a PDCCH monitoring pattern within a slot and isbitmap information that includes 14 bits, each bit of the bitmapinformation corresponds to a respective OFDM symbol #0 to #13 in theslot, the bit of which value is set to 1 indicates a start of a PDCCHmonitoring occasion, the bitmap information is set such that twoadjacent PDCCH monitoring occasions in the slot do not overlap with eachother, and the two adjacent PDCCH monitoring occasions in the slot arebased on a single CORESET duration parameter and a single resource blockfrequency-domain parameter.
 4. A method for a base station, the methodcomprising: sending a first radio resource control (RRC) configurationincluding first information for indicating a control resource set(CORESET) duration; sending a second RRC configuration including secondinformation for indicating physical downlink control channel (PDCCH)monitoring symbols; sending third information for indicating PDCCHmonitoring periodicity k; sending fourth information for indicatingPDCCH monitoring offset o; and transmitting a PDCCH, based on the firstinformation, the second information, the third information, and thefourth information; wherein 0≤o<k, the CORESET duration is set to avalue larger than 1, the second information expresses a PDCCH monitoringpattern within a slot and is bitmap information that includes 14 bits,each bit of the bitmap information corresponds to a respective OFDMsymbol #0 to #13 in the slot, the bit of which value is set to 1indicates a start of a PDCCH monitoring occasion, the bitmap informationis set such that two adjacent PDCCH monitoring occasions in the slot donot overlap with each other, and the two adjacent PDCCH monitoringoccasions in the slot are based on a single CORESET duration parameterand a single resource block frequency-domain parameter.